diff --git a/.openapi-generator/FILES b/.openapi-generator/FILES
index f742669..149c751 100644
--- a/.openapi-generator/FILES
+++ b/.openapi-generator/FILES
@@ -1,5 +1,4 @@
 .gitignore
-.openapi-generator-ignore
 .php-cs-fixer.dist.php
 .travis.yml
 README.md
@@ -49,6 +48,7 @@ lib/Api/ProductsApi.php
 lib/Api/WelcomeApi.php
 lib/ApiException.php
 lib/Configuration.php
+lib/FormDataProcessor.php
 lib/HeaderSelector.php
 lib/Model/Billing.php
 lib/Model/CategoryDto.php
diff --git a/.openapi-generator/VERSION b/.openapi-generator/VERSION
index 5f84a81..2540a3a 100644
--- a/.openapi-generator/VERSION
+++ b/.openapi-generator/VERSION
@@ -1 +1 @@
-7.12.0
+7.20.0
diff --git a/README.md b/README.md
index 39c80f4..889ee6e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# EuromedicaClient (php)
+# Europharmacy\EuromedicaClient
 
 This is an auto-generated client for Euromedica web API
 
@@ -8,8 +8,7 @@ For more information, please visit [http://europharmacy.gr/contact/](http://euro
 
 ### Requirements
 
-PHP 7.4 and later.
-Should also work with PHP 8.0-8.2.
+PHP 8.1 and later.
 
 ### Composer
 
@@ -31,12 +30,19 @@ To install the bindings via [Composer](https://getcomposer.org/), add the follow
 
 Then run `composer install`
 
+### Manual Installation
+Download the files and include `autoload.php`:
+```php
+<?php
+require_once('/path/to/Europharmacy\EuromedicaClient/vendor/autoload.php');
+```
 ## Getting Started
 
 Please follow the [installation procedure](#installation--usage) and then run the following:
 
 ```php
 <?php
+require_once(__DIR__ . '/vendor/autoload.php');
 
 // Configure HTTP basic authorization: basic
 $config = Europharmacy\EuromedicaClient\Configuration::getDefaultConfiguration()
@@ -151,5 +157,6 @@ development@europharmacy.gr
 This PHP package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: `v1`
-    - Generator version: `7.12.0`
+    - Package version: `1.0.1`
+    - Generator version: `7.20.0`
 - Build package: `org.openapitools.codegen.languages.PhpClientCodegen`
diff --git a/composer.json b/composer.json
index 7cf03a7..42da59a 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,6 @@
 {
     "name": "europharmacy/euromedica-client",
+    "version": "1.0.1",
     "description": "No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)",
     "keywords": [
         "openapitools",
@@ -18,9 +19,8 @@
             "homepage": "https://openapi-generator.tech"
         }
     ],
-    "version": "1.0.0",
     "require": {
-        "php": "^7.4 || ^8.0 || ^8.1 || ^8.2",
+        "php": "^8.1 || ^8.2",
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
diff --git a/git_push.sh b/git_push.sh
index 67b52e2..2192b92 100644
--- a/git_push.sh
+++ b/git_push.sh
@@ -9,22 +9,22 @@ release_note=$3
 git_host=$4
 
 if [ "$git_host" = "" ]; then
-    git_host=""
+    git_host="git.dev.precisionlab.gr"
     echo "[INFO] No command line input provided. Set \$git_host to $git_host"
 fi
 
 if [ "$git_user_id" = "" ]; then
-    git_user_id=""
+    git_user_id="pse-pub"
     echo "[INFO] No command line input provided. Set \$git_user_id to $git_user_id"
 fi
 
 if [ "$git_repo_id" = "" ]; then
-    git_repo_id=""
+    git_repo_id="euromedica-client"
     echo "[INFO] No command line input provided. Set \$git_repo_id to $git_repo_id"
 fi
 
 if [ "$release_note" = "" ]; then
-    release_note=""
+    release_note="Minor update"
     echo "[INFO] No command line input provided. Set \$release_note to $release_note"
 fi
 
diff --git a/lib/Api/CustomersApi.php b/lib/Api/CustomersApi.php
index 51f5bb6..1cd1627 100644
--- a/lib/Api/CustomersApi.php
+++ b/lib/Api/CustomersApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * CustomersApi
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -35,8 +35,11 @@ use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\Psr7\MultipartStream;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\RequestOptions;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Europharmacy\EuromedicaClient\ApiException;
 use Europharmacy\EuromedicaClient\Configuration;
+use Europharmacy\EuromedicaClient\FormDataProcessor;
 use Europharmacy\EuromedicaClient\HeaderSelector;
 use Europharmacy\EuromedicaClient\ObjectSerializer;
 
@@ -200,142 +203,39 @@ class CustomersApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 403:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -349,34 +249,11 @@ class CustomersApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -386,7 +263,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -394,7 +271,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -402,7 +279,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -410,7 +287,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 403:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -418,8 +295,10 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -712,142 +591,39 @@ class CustomersApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 403:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -861,34 +637,11 @@ class CustomersApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -898,7 +651,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -906,7 +659,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -914,7 +667,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -922,7 +675,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 403:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -930,8 +683,10 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -1164,115 +919,33 @@ class CustomersApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 403:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -1286,34 +959,11 @@ class CustomersApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\CustomerPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -1323,7 +973,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1331,7 +981,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1339,7 +989,7 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 403:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1347,8 +997,10 @@ class CustomersApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -1531,6 +1183,57 @@ class CustomersApi
             }
         }
 
+        if ($this->config->getCertFile()) {
+            $options[RequestOptions::CERT] = $this->config->getCertFile();
+        }
+
+        if ($this->config->getKeyFile()) {
+            $options[RequestOptions::SSL_KEY] = $this->config->getKeyFile();
+        }
+
         return $options;
     }
+
+    private function handleResponseWithDataType(
+        string $dataType,
+        RequestInterface $request,
+        ResponseInterface $response
+    ): array {
+        if ($dataType === '\SplFileObject') {
+            $content = $response->getBody(); //stream goes to serializer
+        } else {
+            $content = (string) $response->getBody();
+            if ($dataType !== 'string') {
+                try {
+                    $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                } catch (\JsonException $exception) {
+                    throw new ApiException(
+                        sprintf(
+                            'Error JSON decoding server response (%s)',
+                            $request->getUri()
+                        ),
+                        $response->getStatusCode(),
+                        $response->getHeaders(),
+                        $content
+                    );
+                }
+            }
+        }
+
+        return [
+            ObjectSerializer::deserialize($content, $dataType, []),
+            $response->getStatusCode(),
+            $response->getHeaders()
+        ];
+    }
+
+    private function responseWithinRangeCode(
+        string $rangeCode,
+        int $statusCode
+    ): bool {
+        $left = (int) ($rangeCode[0].'00');
+        $right = (int) ($rangeCode[0].'99');
+
+        return $statusCode >= $left && $statusCode <= $right;
+    }
 }
diff --git a/lib/Api/EshopApi.php b/lib/Api/EshopApi.php
index 7487bc6..fbfe7a8 100644
--- a/lib/Api/EshopApi.php
+++ b/lib/Api/EshopApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * EshopApi
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -35,8 +35,11 @@ use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\Psr7\MultipartStream;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\RequestOptions;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Europharmacy\EuromedicaClient\ApiException;
 use Europharmacy\EuromedicaClient\Configuration;
+use Europharmacy\EuromedicaClient\FormDataProcessor;
 use Europharmacy\EuromedicaClient\HeaderSelector;
 use Europharmacy\EuromedicaClient\ObjectSerializer;
 
@@ -187,61 +190,21 @@ class EshopApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -255,34 +218,11 @@ class EshopApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\EOrderPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -292,7 +232,7 @@ class EshopApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -300,8 +240,10 @@ class EshopApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -555,61 +497,21 @@ class EshopApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -623,34 +525,11 @@ class EshopApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\EOrderStatusPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -660,7 +539,7 @@ class EshopApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -668,8 +547,10 @@ class EshopApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -931,6 +812,57 @@ class EshopApi
             }
         }
 
+        if ($this->config->getCertFile()) {
+            $options[RequestOptions::CERT] = $this->config->getCertFile();
+        }
+
+        if ($this->config->getKeyFile()) {
+            $options[RequestOptions::SSL_KEY] = $this->config->getKeyFile();
+        }
+
         return $options;
     }
+
+    private function handleResponseWithDataType(
+        string $dataType,
+        RequestInterface $request,
+        ResponseInterface $response
+    ): array {
+        if ($dataType === '\SplFileObject') {
+            $content = $response->getBody(); //stream goes to serializer
+        } else {
+            $content = (string) $response->getBody();
+            if ($dataType !== 'string') {
+                try {
+                    $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                } catch (\JsonException $exception) {
+                    throw new ApiException(
+                        sprintf(
+                            'Error JSON decoding server response (%s)',
+                            $request->getUri()
+                        ),
+                        $response->getStatusCode(),
+                        $response->getHeaders(),
+                        $content
+                    );
+                }
+            }
+        }
+
+        return [
+            ObjectSerializer::deserialize($content, $dataType, []),
+            $response->getStatusCode(),
+            $response->getHeaders()
+        ];
+    }
+
+    private function responseWithinRangeCode(
+        string $rangeCode,
+        int $statusCode
+    ): bool {
+        $left = (int) ($rangeCode[0].'00');
+        $right = (int) ($rangeCode[0].'99');
+
+        return $statusCode >= $left && $statusCode <= $right;
+    }
 }
diff --git a/lib/Api/MasterDataApi.php b/lib/Api/MasterDataApi.php
index 8e16e49..ab3bb63 100644
--- a/lib/Api/MasterDataApi.php
+++ b/lib/Api/MasterDataApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * MasterDataApi
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -35,8 +35,11 @@ use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\Psr7\MultipartStream;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\RequestOptions;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Europharmacy\EuromedicaClient\ApiException;
 use Europharmacy\EuromedicaClient\Configuration;
+use Europharmacy\EuromedicaClient\FormDataProcessor;
 use Europharmacy\EuromedicaClient\HeaderSelector;
 use Europharmacy\EuromedicaClient\ObjectSerializer;
 
@@ -198,115 +201,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\CategoryDtoListPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\CategoryDtoListPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\CategoryDtoListPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\CategoryDtoListPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -320,34 +241,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\CategoryDtoListPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\CategoryDtoListPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -357,7 +255,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -365,7 +263,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -373,7 +271,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -381,8 +279,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -595,115 +495,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\MainCategoryDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\MainCategoryDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\MainCategoryDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\MainCategoryDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -717,34 +535,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\MainCategoryDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\MainCategoryDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -754,7 +549,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -762,7 +557,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -770,7 +565,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -778,8 +573,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -992,115 +789,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\OikosDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\OikosDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\OikosDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\OikosDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -1114,34 +829,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\OikosDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\OikosDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -1151,7 +843,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1159,7 +851,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1167,7 +859,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1175,8 +867,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -1389,115 +1083,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\OwnerDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\OwnerDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\OwnerDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\OwnerDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -1511,34 +1123,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\OwnerDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\OwnerDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -1548,7 +1137,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1556,7 +1145,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1564,7 +1153,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1572,8 +1161,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -1786,115 +1377,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\PersonalCategoryDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\PersonalCategoryDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\PersonalCategoryDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\PersonalCategoryDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -1908,34 +1417,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\PersonalCategoryDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\PersonalCategoryDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -1945,7 +1431,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1953,7 +1439,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1961,7 +1447,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1969,8 +1455,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -2183,115 +1671,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\SubCategoryDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\SubCategoryDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\SubCategoryDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\SubCategoryDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -2305,34 +1711,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\SubCategoryDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\SubCategoryDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -2342,7 +1725,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -2350,7 +1733,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -2358,7 +1741,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -2366,8 +1749,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -2580,115 +1965,33 @@ class MasterDataApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\VatCategoryDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\VatCategoryDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\VatCategoryDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\VatCategoryDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -2702,34 +2005,11 @@ class MasterDataApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\VatCategoryDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\VatCategoryDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -2739,7 +2019,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -2747,7 +2027,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -2755,7 +2035,7 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -2763,8 +2043,10 @@ class MasterDataApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -2936,6 +2218,57 @@ class MasterDataApi
             }
         }
 
+        if ($this->config->getCertFile()) {
+            $options[RequestOptions::CERT] = $this->config->getCertFile();
+        }
+
+        if ($this->config->getKeyFile()) {
+            $options[RequestOptions::SSL_KEY] = $this->config->getKeyFile();
+        }
+
         return $options;
     }
+
+    private function handleResponseWithDataType(
+        string $dataType,
+        RequestInterface $request,
+        ResponseInterface $response
+    ): array {
+        if ($dataType === '\SplFileObject') {
+            $content = $response->getBody(); //stream goes to serializer
+        } else {
+            $content = (string) $response->getBody();
+            if ($dataType !== 'string') {
+                try {
+                    $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                } catch (\JsonException $exception) {
+                    throw new ApiException(
+                        sprintf(
+                            'Error JSON decoding server response (%s)',
+                            $request->getUri()
+                        ),
+                        $response->getStatusCode(),
+                        $response->getHeaders(),
+                        $content
+                    );
+                }
+            }
+        }
+
+        return [
+            ObjectSerializer::deserialize($content, $dataType, []),
+            $response->getStatusCode(),
+            $response->getHeaders()
+        ];
+    }
+
+    private function responseWithinRangeCode(
+        string $rangeCode,
+        int $statusCode
+    ): bool {
+        $left = (int) ($rangeCode[0].'00');
+        $right = (int) ($rangeCode[0].'99');
+
+        return $statusCode >= $left && $statusCode <= $right;
+    }
 }
diff --git a/lib/Api/ProductsApi.php b/lib/Api/ProductsApi.php
index 2fed4b1..6ea5390 100644
--- a/lib/Api/ProductsApi.php
+++ b/lib/Api/ProductsApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * ProductsApi
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -35,8 +35,11 @@ use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\Psr7\MultipartStream;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\RequestOptions;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Europharmacy\EuromedicaClient\ApiException;
 use Europharmacy\EuromedicaClient\Configuration;
+use Europharmacy\EuromedicaClient\FormDataProcessor;
 use Europharmacy\EuromedicaClient\HeaderSelector;
 use Europharmacy\EuromedicaClient\ObjectSerializer;
 
@@ -188,142 +191,39 @@ class ProductsApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProductDto' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProductDto' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProductDto', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProductDto',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 403:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -337,34 +237,11 @@ class ProductsApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\ProductDto';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\ProductDto',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -374,7 +251,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -382,7 +259,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -390,7 +267,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -398,7 +275,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 403:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -406,8 +283,10 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -636,142 +515,39 @@ class ProductsApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProductDto' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProductDto' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProductDto', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProductDto',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 403:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -785,34 +561,11 @@ class ProductsApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\ProductDto';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\ProductDto',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -822,7 +575,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -830,7 +583,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -838,7 +591,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -846,7 +599,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 403:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -854,8 +607,10 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -1096,142 +851,39 @@ class ProductsApi
 
             switch($statusCode) {
                 case 200:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProductDtoPagedResponse' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProductDtoPagedResponse' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProductDtoPagedResponse', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProductDtoPagedResponse',
+                        $request,
+                        $response,
+                    );
                 case 404:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 400:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
                 case 403:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -1245,34 +897,11 @@ class ProductsApi
                 );
             }
 
-            $returnType = '\Europharmacy\EuromedicaClient\Model\ProductDtoPagedResponse';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                '\Europharmacy\EuromedicaClient\Model\ProductDtoPagedResponse',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -1282,7 +911,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 404:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1290,7 +919,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 400:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1298,7 +927,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1306,7 +935,7 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 403:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -1314,8 +943,10 @@ class ProductsApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -1584,6 +1215,57 @@ class ProductsApi
             }
         }
 
+        if ($this->config->getCertFile()) {
+            $options[RequestOptions::CERT] = $this->config->getCertFile();
+        }
+
+        if ($this->config->getKeyFile()) {
+            $options[RequestOptions::SSL_KEY] = $this->config->getKeyFile();
+        }
+
         return $options;
     }
+
+    private function handleResponseWithDataType(
+        string $dataType,
+        RequestInterface $request,
+        ResponseInterface $response
+    ): array {
+        if ($dataType === '\SplFileObject') {
+            $content = $response->getBody(); //stream goes to serializer
+        } else {
+            $content = (string) $response->getBody();
+            if ($dataType !== 'string') {
+                try {
+                    $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                } catch (\JsonException $exception) {
+                    throw new ApiException(
+                        sprintf(
+                            'Error JSON decoding server response (%s)',
+                            $request->getUri()
+                        ),
+                        $response->getStatusCode(),
+                        $response->getHeaders(),
+                        $content
+                    );
+                }
+            }
+        }
+
+        return [
+            ObjectSerializer::deserialize($content, $dataType, []),
+            $response->getStatusCode(),
+            $response->getHeaders()
+        ];
+    }
+
+    private function responseWithinRangeCode(
+        string $rangeCode,
+        int $statusCode
+    ): bool {
+        $left = (int) ($rangeCode[0].'00');
+        $right = (int) ($rangeCode[0].'99');
+
+        return $statusCode >= $left && $statusCode <= $right;
+    }
 }
diff --git a/lib/Api/WelcomeApi.php b/lib/Api/WelcomeApi.php
index 12680a1..cfcafe3 100644
--- a/lib/Api/WelcomeApi.php
+++ b/lib/Api/WelcomeApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * WelcomeApi
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -35,8 +35,11 @@ use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\Psr7\MultipartStream;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\RequestOptions;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Europharmacy\EuromedicaClient\ApiException;
 use Europharmacy\EuromedicaClient\Configuration;
+use Europharmacy\EuromedicaClient\FormDataProcessor;
 use Europharmacy\EuromedicaClient\HeaderSelector;
 use Europharmacy\EuromedicaClient\ObjectSerializer;
 
@@ -182,34 +185,15 @@ class WelcomeApi
 
             switch($statusCode) {
                 case 200:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -223,34 +207,11 @@ class WelcomeApi
                 );
             }
 
-            $returnType = 'string';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                'string',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -260,8 +221,10 @@ class WelcomeApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -460,10 +423,11 @@ class WelcomeApi
 
 
             return [null, $statusCode, $response->getHeaders()];
-
         } catch (ApiException $e) {
             switch ($e->getCode()) {
             }
+        
+
             throw $e;
         }
     }
@@ -651,61 +615,21 @@ class WelcomeApi
 
             switch($statusCode) {
                 case 200:
-                    if ('string' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('string' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, 'string', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
                 case 401:
-                    if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' === '\SplFileObject') {
-                        $content = $response->getBody(); //stream goes to serializer
-                    } else {
-                        $content = (string) $response->getBody();
-                        if ('\Europharmacy\EuromedicaClient\Model\ProblemDetails' !== 'string') {
-                            try {
-                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                            } catch (\JsonException $exception) {
-                                throw new ApiException(
-                                    sprintf(
-                                        'Error JSON decoding server response (%s)',
-                                        $request->getUri()
-                                    ),
-                                    $statusCode,
-                                    $response->getHeaders(),
-                                    $content
-                                );
-                            }
-                        }
-                    }
-
-                    return [
-                        ObjectSerializer::deserialize($content, '\Europharmacy\EuromedicaClient\Model\ProblemDetails', []),
-                        $response->getStatusCode(),
-                        $response->getHeaders()
-                    ];
+                    return $this->handleResponseWithDataType(
+                        '\Europharmacy\EuromedicaClient\Model\ProblemDetails',
+                        $request,
+                        $response,
+                    );
             }
 
+            
+
             if ($statusCode < 200 || $statusCode > 299) {
                 throw new ApiException(
                     sprintf(
@@ -719,34 +643,11 @@ class WelcomeApi
                 );
             }
 
-            $returnType = 'string';
-            if ($returnType === '\SplFileObject') {
-                $content = $response->getBody(); //stream goes to serializer
-            } else {
-                $content = (string) $response->getBody();
-                if ($returnType !== 'string') {
-                    try {
-                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
-                    } catch (\JsonException $exception) {
-                        throw new ApiException(
-                            sprintf(
-                                'Error JSON decoding server response (%s)',
-                                $request->getUri()
-                            ),
-                            $statusCode,
-                            $response->getHeaders(),
-                            $content
-                        );
-                    }
-                }
-            }
-
-            return [
-                ObjectSerializer::deserialize($content, $returnType, []),
-                $response->getStatusCode(),
-                $response->getHeaders()
-            ];
-
+            return $this->handleResponseWithDataType(
+                'string',
+                $request,
+                $response,
+            );
         } catch (ApiException $e) {
             switch ($e->getCode()) {
                 case 200:
@@ -756,7 +657,7 @@ class WelcomeApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
                 case 401:
                     $data = ObjectSerializer::deserialize(
                         $e->getResponseBody(),
@@ -764,8 +665,10 @@ class WelcomeApi
                         $e->getResponseHeaders()
                     );
                     $e->setResponseObject($data);
-                    break;
+                    throw $e;
             }
+        
+
             throw $e;
         }
     }
@@ -933,6 +836,57 @@ class WelcomeApi
             }
         }
 
+        if ($this->config->getCertFile()) {
+            $options[RequestOptions::CERT] = $this->config->getCertFile();
+        }
+
+        if ($this->config->getKeyFile()) {
+            $options[RequestOptions::SSL_KEY] = $this->config->getKeyFile();
+        }
+
         return $options;
     }
+
+    private function handleResponseWithDataType(
+        string $dataType,
+        RequestInterface $request,
+        ResponseInterface $response
+    ): array {
+        if ($dataType === '\SplFileObject') {
+            $content = $response->getBody(); //stream goes to serializer
+        } else {
+            $content = (string) $response->getBody();
+            if ($dataType !== 'string') {
+                try {
+                    $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                } catch (\JsonException $exception) {
+                    throw new ApiException(
+                        sprintf(
+                            'Error JSON decoding server response (%s)',
+                            $request->getUri()
+                        ),
+                        $response->getStatusCode(),
+                        $response->getHeaders(),
+                        $content
+                    );
+                }
+            }
+        }
+
+        return [
+            ObjectSerializer::deserialize($content, $dataType, []),
+            $response->getStatusCode(),
+            $response->getHeaders()
+        ];
+    }
+
+    private function responseWithinRangeCode(
+        string $rangeCode,
+        int $statusCode
+    ): bool {
+        $left = (int) ($rangeCode[0].'00');
+        $right = (int) ($rangeCode[0].'99');
+
+        return $statusCode >= $left && $statusCode <= $right;
+    }
 }
diff --git a/lib/ApiException.php b/lib/ApiException.php
index 9628c8b..39a217d 100644
--- a/lib/ApiException.php
+++ b/lib/ApiException.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * ApiException
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/lib/Configuration.php b/lib/Configuration.php
index 3813840..3faae15 100644
--- a/lib/Configuration.php
+++ b/lib/Configuration.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * Configuration
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -30,7 +30,7 @@ namespace Europharmacy\EuromedicaClient;
 
 /**
  * Configuration Class Doc Comment
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -124,6 +124,20 @@ class Configuration
      */
     protected $tempFolderPath;
 
+    /**
+     * Path to a certificate file, for mTLS
+     *
+     * @var string
+     */
+    protected $certFile;
+
+    /**
+     * Path to a key file, for mTLS
+     *
+     * @var string
+     */
+    protected $keyFile;
+
     /**
      * Constructor
      */
@@ -397,6 +411,49 @@ class Configuration
         return $this->tempFolderPath;
     }
 
+    /**
+     * Sets the certificate file path, for mTLS
+     *
+     * @return $this
+     */
+     public function setCertFile($certFile)
+     {
+        $this->certFile = $certFile;
+        return $this;
+     }
+
+    /**
+     * Gets the certificate file path, for mTLS
+     *
+     * @return string Certificate file path
+     */
+    public function getCertFile()
+    {
+        return $this->certFile;
+    }
+
+    /**
+     * Sets the certificate key path, for mTLS
+     *
+     * @return $this
+     */
+     public function setKeyFile($keyFile)
+     {
+        $this->keyFile = $keyFile;
+        return $this;
+     }
+
+    /**
+     * Gets the certificate key path, for mTLS
+     *
+     * @return string Certificate key path
+     */
+    public function getKeyFile()
+    {
+        return $this->keyFile;
+    }
+    
+
     /**
      * Gets the default configuration instance
      *
@@ -434,6 +491,7 @@ class Configuration
         $report .= '    OS: ' . php_uname() . PHP_EOL;
         $report .= '    PHP Version: ' . PHP_VERSION . PHP_EOL;
         $report .= '    The version of the OpenAPI document: v1' . PHP_EOL;
+        $report .= '    SDK Package Version: 1.0.0' . PHP_EOL;
         $report .= '    Temp Folder Path: ' . self::getDefaultConfiguration()->getTempFolderPath() . PHP_EOL;
 
         return $report;
diff --git a/lib/FormDataProcessor.php b/lib/FormDataProcessor.php
new file mode 100644
index 0000000..c522aee
--- /dev/null
+++ b/lib/FormDataProcessor.php
@@ -0,0 +1,247 @@
+<?php
+/**
+ * FormDataProcessor
+ * PHP version 7.4
+ *
+ * @category Class
+ * @package  Europharmacy\EuromedicaClient
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * Euromedica Two Web Api
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: v1
+ * Contact: development@europharmacy.gr
+ * Generated by: https://openapi-generator.tech
+ * Generator version: 7.20.0
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+namespace Europharmacy\EuromedicaClient;
+
+use ArrayAccess;
+use DateTime;
+use GuzzleHttp\Psr7\Utils;
+use Psr\Http\Message\StreamInterface;
+use SplFileObject;
+use Europharmacy\EuromedicaClient\Model\ModelInterface;
+
+/**
+ * FormDataProcessor Class Doc Comment
+ *
+ * @category Class
+ * @package  Europharmacy\EuromedicaClient
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+class FormDataProcessor
+{
+    /**
+     * Tags whether payload passed to ::prepare() contains one or more
+     * SplFileObject or stream values.
+     */
+    public bool $has_file = false;
+
+    /**
+     * Take value and turn it into an array suitable for inclusion in
+     * the http body (form parameter). If it's a string, pass through unchanged
+     * If it's a datetime object, format it in ISO8601
+     *
+     * @param array<string|bool|array|DateTime|ArrayAccess|SplFileObject> $values the value of the form parameter
+     *
+     * @return array [key => value] of formdata
+     */
+    public function prepare(array $values): array
+    {
+        $this->has_file = false;
+        $result = [];
+
+        foreach ($values as $k => $v) {
+            if ($v === null) {
+                continue;
+            }
+
+            $result[$k] = $this->makeFormSafe($v);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Flattens a multi-level array of data and generates a single-level array
+     * compatible with formdata - a single-level array where the keys use bracket
+     * notation to signify nested data.
+     *
+     * credit: https://github.com/FranBar1966/FlatPHP
+     */
+    public static function flatten(array $source, string $start = ''): array
+    {
+        $opt = [
+            'prefix'          => '[',
+            'suffix'          => ']',
+            'suffix-end'      => true,
+            'prefix-list'     => '[',
+            'suffix-list'     => ']',
+            'suffix-list-end' => true,
+        ];
+
+        if ($start === '') {
+            $currentPrefix    = '';
+            $currentSuffix    = '';
+            $currentSuffixEnd = false;
+        } elseif (array_is_list($source)) {
+            $currentPrefix    = $opt['prefix-list'];
+            $currentSuffix    = $opt['suffix-list'];
+            $currentSuffixEnd = $opt['suffix-list-end'];
+        } else {
+            $currentPrefix    = $opt['prefix'];
+            $currentSuffix    = $opt['suffix'];
+            $currentSuffixEnd = $opt['suffix-end'];
+        }
+
+        $currentName = $start;
+        $result = [];
+
+        foreach ($source as $key => $val) {
+            $currentName .= $currentPrefix.$key;
+
+            if (is_array($val) && !empty($val)) {
+                $currentName .= $currentSuffix;
+                $result += self::flatten($val, $currentName);
+            } else {
+                if ($currentSuffixEnd) {
+                    $currentName .= $currentSuffix;
+                }
+
+                if (is_resource($val)) {
+                    $result[$currentName] = $val;
+                } else {
+                    $result[$currentName] = ObjectSerializer::toString($val);
+                }
+            }
+
+            $currentName = $start;
+        }
+
+        return $result;
+    }
+
+    /**
+     * formdata must be limited to scalars or arrays of scalar values,
+     * or a resource for a file upload. Here we iterate through all available
+     * data and identify how to handle each scenario
+     */
+    protected function makeFormSafe($value)
+    {
+        if ($value instanceof SplFileObject) {
+            return $this->processFiles([$value])[0];
+        }
+
+        if (is_resource($value)) {
+            $this->has_file = true;
+
+            return $value;
+        }
+
+        if ($value instanceof ModelInterface) {
+            return $this->processModel($value);
+        }
+
+        if (is_array($value) || (is_object($value) && !$value instanceof \DateTimeInterface)) {
+            $data = [];
+
+            foreach ($value as $k => $v) {
+                $data[$k] = $this->makeFormSafe($v);
+            }
+
+            return $data;
+        }
+
+        return ObjectSerializer::toString($value);
+    }
+
+    /**
+     * We are able to handle nested ModelInterface. We do not simply call
+     * json_decode(json_encode()) because any given model may have binary data
+     * or other data that cannot be serialized to a JSON string
+     */
+    protected function processModel(ModelInterface $model): array
+    {
+        $result = [];
+
+        foreach ($model::openAPITypes() as $name => $type) {
+            $value = $model->offsetGet($name);
+
+            if ($value === null) {
+                continue;
+            }
+
+            if (strpos($type, '\SplFileObject') !== false) {
+                $file = is_array($value) ? $value : [$value];
+                $result[$name] = $this->processFiles($file);
+
+                continue;
+            }
+
+            if ($value instanceof ModelInterface) {
+                $result[$name] = $this->processModel($value);
+
+                continue;
+            }
+
+            if (is_array($value) || is_object($value)) {
+                $result[$name] = $this->makeFormSafe($value);
+
+                continue;
+            }
+
+            $result[$name] = ObjectSerializer::toString($value);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Handle file data
+     */
+    protected function processFiles(array $files): array
+    {
+        $this->has_file = true;
+
+        $result = [];
+
+        foreach ($files as $i => $file) {
+            if (is_array($file)) {
+                $result[$i] = $this->processFiles($file);
+
+                continue;
+            }
+
+            if ($file instanceof StreamInterface) {
+                $result[$i] = $file;
+
+                continue;
+            }
+
+            if ($file instanceof SplFileObject) {
+                $result[$i] = $this->tryFopen($file);
+            }
+        }
+
+        return $result;
+    }
+
+    private function tryFopen(SplFileObject $file)
+    {
+        return Utils::tryFopen($file->getRealPath(), 'rb');
+    }
+}
diff --git a/lib/HeaderSelector.php b/lib/HeaderSelector.php
index f5e7125..ac63257 100644
--- a/lib/HeaderSelector.php
+++ b/lib/HeaderSelector.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * HeaderSelector
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/lib/Model/Billing.php b/lib/Model/Billing.php
index cd849a5..bf67f60 100644
--- a/lib/Model/Billing.php
+++ b/lib/Model/Billing.php
@@ -2,7 +2,7 @@
 /**
  * Billing
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -1076,11 +1076,11 @@ class Billing implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -1088,12 +1088,12 @@ class Billing implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -1118,11 +1118,11 @@ class Billing implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/CategoryDto.php b/lib/Model/CategoryDto.php
index c3f3734..4cc6a89 100644
--- a/lib/Model/CategoryDto.php
+++ b/lib/Model/CategoryDto.php
@@ -2,7 +2,7 @@
 /**
  * CategoryDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -367,11 +367,11 @@ class CategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -379,12 +379,12 @@ class CategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -409,11 +409,11 @@ class CategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/CategoryDtoListPagedResponse.php b/lib/Model/CategoryDtoListPagedResponse.php
index daec77e..2d5b101 100644
--- a/lib/Model/CategoryDtoListPagedResponse.php
+++ b/lib/Model/CategoryDtoListPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * CategoryDtoListPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class CategoryDtoListPagedResponse implements ModelInterface, ArrayAccess, \Json
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class CategoryDtoListPagedResponse implements ModelInterface, ArrayAccess, \Json
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class CategoryDtoListPagedResponse implements ModelInterface, ArrayAccess, \Json
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Coupon.php b/lib/Model/Coupon.php
index b04f321..99b773c 100644
--- a/lib/Model/Coupon.php
+++ b/lib/Model/Coupon.php
@@ -2,7 +2,7 @@
 /**
  * Coupon
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -360,11 +360,11 @@ class Coupon implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -372,12 +372,12 @@ class Coupon implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -402,11 +402,11 @@ class Coupon implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Coupons.php b/lib/Model/Coupons.php
index 77fa48c..74c0e97 100644
--- a/lib/Model/Coupons.php
+++ b/lib/Model/Coupons.php
@@ -2,7 +2,7 @@
 /**
  * Coupons
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -327,11 +327,11 @@ class Coupons implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -339,12 +339,12 @@ class Coupons implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -369,11 +369,11 @@ class Coupons implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Customer.php b/lib/Model/Customer.php
index 94d78cf..e9993d7 100644
--- a/lib/Model/Customer.php
+++ b/lib/Model/Customer.php
@@ -2,7 +2,7 @@
 /**
  * Customer
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -1166,11 +1166,11 @@ class Customer implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -1178,12 +1178,12 @@ class Customer implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -1208,11 +1208,11 @@ class Customer implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/CustomerDto.php b/lib/Model/CustomerDto.php
index b7f5148..01e0678 100644
--- a/lib/Model/CustomerDto.php
+++ b/lib/Model/CustomerDto.php
@@ -2,7 +2,7 @@
 /**
  * CustomerDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -1204,11 +1204,11 @@ class CustomerDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -1216,12 +1216,12 @@ class CustomerDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -1246,11 +1246,11 @@ class CustomerDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/CustomerPagedResponse.php b/lib/Model/CustomerPagedResponse.php
index b3bb1fe..30db036 100644
--- a/lib/Model/CustomerPagedResponse.php
+++ b/lib/Model/CustomerPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * CustomerPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class CustomerPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class CustomerPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class CustomerPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/EOrder.php b/lib/Model/EOrder.php
index fe172aa..bc8130b 100644
--- a/lib/Model/EOrder.php
+++ b/lib/Model/EOrder.php
@@ -2,7 +2,7 @@
 /**
  * EOrder
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -1101,11 +1101,11 @@ class EOrder implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -1113,12 +1113,12 @@ class EOrder implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -1143,11 +1143,11 @@ class EOrder implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/EOrderPagedResponse.php b/lib/Model/EOrderPagedResponse.php
index 7940617..a79cf8f 100644
--- a/lib/Model/EOrderPagedResponse.php
+++ b/lib/Model/EOrderPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * EOrderPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class EOrderPagedResponse implements ModelInterface, ArrayAccess, \JsonSerializa
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class EOrderPagedResponse implements ModelInterface, ArrayAccess, \JsonSerializa
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class EOrderPagedResponse implements ModelInterface, ArrayAccess, \JsonSerializa
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/EOrderStatus.php b/lib/Model/EOrderStatus.php
index 4b45074..5ea3143 100644
--- a/lib/Model/EOrderStatus.php
+++ b/lib/Model/EOrderStatus.php
@@ -2,7 +2,7 @@
 /**
  * EOrderStatus
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -592,11 +592,11 @@ class EOrderStatus implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -604,12 +604,12 @@ class EOrderStatus implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -634,11 +634,11 @@ class EOrderStatus implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/EOrderStatusPagedResponse.php b/lib/Model/EOrderStatusPagedResponse.php
index 42a5f59..e90335c 100644
--- a/lib/Model/EOrderStatusPagedResponse.php
+++ b/lib/Model/EOrderStatusPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * EOrderStatusPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class EOrderStatusPagedResponse implements ModelInterface, ArrayAccess, \JsonSer
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class EOrderStatusPagedResponse implements ModelInterface, ArrayAccess, \JsonSer
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class EOrderStatusPagedResponse implements ModelInterface, ArrayAccess, \JsonSer
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Fee.php b/lib/Model/Fee.php
index 422d771..b5ecc3d 100644
--- a/lib/Model/Fee.php
+++ b/lib/Model/Fee.php
@@ -2,7 +2,7 @@
 /**
  * Fee
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -492,11 +492,11 @@ class Fee implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -504,12 +504,12 @@ class Fee implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -534,11 +534,11 @@ class Fee implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Fees.php b/lib/Model/Fees.php
index 5b6186f..bd8472b 100644
--- a/lib/Model/Fees.php
+++ b/lib/Model/Fees.php
@@ -2,7 +2,7 @@
 /**
  * Fees
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -327,11 +327,11 @@ class Fees implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -339,12 +339,12 @@ class Fees implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -369,11 +369,11 @@ class Fees implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Item.php b/lib/Model/Item.php
index 478d905..06ae629 100644
--- a/lib/Model/Item.php
+++ b/lib/Model/Item.php
@@ -2,7 +2,7 @@
 /**
  * Item
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -545,11 +545,11 @@ class Item implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -557,12 +557,12 @@ class Item implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -587,11 +587,11 @@ class Item implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Items.php b/lib/Model/Items.php
index c1185eb..0ae9973 100644
--- a/lib/Model/Items.php
+++ b/lib/Model/Items.php
@@ -2,7 +2,7 @@
 /**
  * Items
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -327,11 +327,11 @@ class Items implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -339,12 +339,12 @@ class Items implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -369,11 +369,11 @@ class Items implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/MainCategoryDto.php b/lib/Model/MainCategoryDto.php
index 025c2d3..641c4f6 100644
--- a/lib/Model/MainCategoryDto.php
+++ b/lib/Model/MainCategoryDto.php
@@ -2,7 +2,7 @@
 /**
  * MainCategoryDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -367,11 +367,11 @@ class MainCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -379,12 +379,12 @@ class MainCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -409,11 +409,11 @@ class MainCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/MainCategoryDtoPagedResponse.php b/lib/Model/MainCategoryDtoPagedResponse.php
index 40d3b83..d4ffa53 100644
--- a/lib/Model/MainCategoryDtoPagedResponse.php
+++ b/lib/Model/MainCategoryDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * MainCategoryDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class MainCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \Json
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class MainCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \Json
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class MainCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \Json
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/ModelInterface.php b/lib/Model/ModelInterface.php
index 2d5df31..197863d 100644
--- a/lib/Model/ModelInterface.php
+++ b/lib/Model/ModelInterface.php
@@ -2,7 +2,7 @@
 /**
  * ModelInterface
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient\Model
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/lib/Model/OikosDto.php b/lib/Model/OikosDto.php
index b599428..e6f8374 100644
--- a/lib/Model/OikosDto.php
+++ b/lib/Model/OikosDto.php
@@ -2,7 +2,7 @@
 /**
  * OikosDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -408,11 +408,11 @@ class OikosDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -420,12 +420,12 @@ class OikosDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -450,11 +450,11 @@ class OikosDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/OikosDtoPagedResponse.php b/lib/Model/OikosDtoPagedResponse.php
index 78739bf..d4afa05 100644
--- a/lib/Model/OikosDtoPagedResponse.php
+++ b/lib/Model/OikosDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * OikosDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class OikosDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class OikosDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class OikosDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/OwnerDto.php b/lib/Model/OwnerDto.php
index e691fa2..4450eb8 100644
--- a/lib/Model/OwnerDto.php
+++ b/lib/Model/OwnerDto.php
@@ -2,7 +2,7 @@
 /**
  * OwnerDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -367,11 +367,11 @@ class OwnerDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -379,12 +379,12 @@ class OwnerDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -409,11 +409,11 @@ class OwnerDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/OwnerDtoPagedResponse.php b/lib/Model/OwnerDtoPagedResponse.php
index 3bd17df..b5e8e8d 100644
--- a/lib/Model/OwnerDtoPagedResponse.php
+++ b/lib/Model/OwnerDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * OwnerDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class OwnerDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class OwnerDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class OwnerDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeriali
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/PersonalCategoryDto.php b/lib/Model/PersonalCategoryDto.php
index 236132b..552aa27 100644
--- a/lib/Model/PersonalCategoryDto.php
+++ b/lib/Model/PersonalCategoryDto.php
@@ -2,7 +2,7 @@
 /**
  * PersonalCategoryDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -483,11 +483,11 @@ class PersonalCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializa
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -495,12 +495,12 @@ class PersonalCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializa
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -525,11 +525,11 @@ class PersonalCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializa
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/PersonalCategoryDtoPagedResponse.php b/lib/Model/PersonalCategoryDtoPagedResponse.php
index 9cb5a51..bfba15a 100644
--- a/lib/Model/PersonalCategoryDtoPagedResponse.php
+++ b/lib/Model/PersonalCategoryDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * PersonalCategoryDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class PersonalCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class PersonalCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class PersonalCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/ProblemDetails.php b/lib/Model/ProblemDetails.php
index de93e15..ebb0dbc 100644
--- a/lib/Model/ProblemDetails.php
+++ b/lib/Model/ProblemDetails.php
@@ -2,7 +2,7 @@
 /**
  * ProblemDetails
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -490,11 +490,11 @@ class ProblemDetails implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -502,12 +502,12 @@ class ProblemDetails implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -532,11 +532,11 @@ class ProblemDetails implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/ProductDto.php b/lib/Model/ProductDto.php
index c23d399..2720bdc 100644
--- a/lib/Model/ProductDto.php
+++ b/lib/Model/ProductDto.php
@@ -2,7 +2,7 @@
 /**
  * ProductDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -1656,11 +1656,11 @@ class ProductDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -1668,12 +1668,12 @@ class ProductDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -1698,11 +1698,11 @@ class ProductDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/ProductDtoPagedResponse.php b/lib/Model/ProductDtoPagedResponse.php
index 8c9538c..e7d58da 100644
--- a/lib/Model/ProductDtoPagedResponse.php
+++ b/lib/Model/ProductDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * ProductDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class ProductDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeria
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class ProductDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeria
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class ProductDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonSeria
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/Shipping.php b/lib/Model/Shipping.php
index ac305af..0bf2c14 100644
--- a/lib/Model/Shipping.php
+++ b/lib/Model/Shipping.php
@@ -2,7 +2,7 @@
 /**
  * Shipping
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -838,11 +838,11 @@ class Shipping implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -850,12 +850,12 @@ class Shipping implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -880,11 +880,11 @@ class Shipping implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/SubCategoryDto.php b/lib/Model/SubCategoryDto.php
index 3d9652f..a7903e7 100644
--- a/lib/Model/SubCategoryDto.php
+++ b/lib/Model/SubCategoryDto.php
@@ -2,7 +2,7 @@
 /**
  * SubCategoryDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -408,11 +408,11 @@ class SubCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -420,12 +420,12 @@ class SubCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -450,11 +450,11 @@ class SubCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/SubCategoryDtoPagedResponse.php b/lib/Model/SubCategoryDtoPagedResponse.php
index 9c80522..296bd02 100644
--- a/lib/Model/SubCategoryDtoPagedResponse.php
+++ b/lib/Model/SubCategoryDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * SubCategoryDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class SubCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonS
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class SubCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonS
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class SubCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonS
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/VatCategoryDto.php b/lib/Model/VatCategoryDto.php
index 68d1b5c..b4b5ae0 100644
--- a/lib/Model/VatCategoryDto.php
+++ b/lib/Model/VatCategoryDto.php
@@ -2,7 +2,7 @@
 /**
  * VatCategoryDto
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -394,11 +394,11 @@ class VatCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -406,12 +406,12 @@ class VatCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -436,11 +436,11 @@ class VatCategoryDto implements ModelInterface, ArrayAccess, \JsonSerializable
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/Model/VatCategoryDtoPagedResponse.php b/lib/Model/VatCategoryDtoPagedResponse.php
index 04f5658..073b7d4 100644
--- a/lib/Model/VatCategoryDtoPagedResponse.php
+++ b/lib/Model/VatCategoryDtoPagedResponse.php
@@ -2,7 +2,7 @@
 /**
  * VatCategoryDtoPagedResponse
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -639,11 +639,11 @@ class VatCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonS
     /**
      * Returns true if offset exists. False otherwise.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return boolean
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->container[$offset]);
     }
@@ -651,12 +651,12 @@ class VatCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonS
     /**
      * Gets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return mixed|null
      */
     #[\ReturnTypeWillChange]
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset)
     {
         return $this->container[$offset] ?? null;
     }
@@ -681,11 +681,11 @@ class VatCategoryDtoPagedResponse implements ModelInterface, ArrayAccess, \JsonS
     /**
      * Unsets offset.
      *
-     * @param integer $offset Offset
+     * @param integer|string $offset Offset
      *
      * @return void
      */
-    public function offsetUnset($offset): void
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->container[$offset]);
     }
diff --git a/lib/ObjectSerializer.php b/lib/ObjectSerializer.php
index 07daefb..435a920 100644
--- a/lib/ObjectSerializer.php
+++ b/lib/ObjectSerializer.php
@@ -2,7 +2,7 @@
 /**
  * ObjectSerializer
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
@@ -324,24 +324,6 @@ class ObjectSerializer
         return self::toString($value);
     }
 
-    /**
-     * Take value and turn it into a string suitable for inclusion in
-     * the http body (form parameter). If it's a string, pass through unchanged
-     * If it's a datetime object, format it in ISO8601
-     *
-     * @param string|\SplFileObject $value the value of the form parameter
-     *
-     * @return string the form string
-     */
-    public static function toFormValue($value)
-    {
-        if ($value instanceof \SplFileObject) {
-            return $value->getRealPath();
-        } else {
-            return self::toString($value);
-        }
-    }
-
     /**
      * Take value and turn it into a string suitable for inclusion in
      * the parameter. If it's a string, pass through unchanged
@@ -613,6 +595,6 @@ class ObjectSerializer
             }
         }
 
-        return $qs ? (string) substr($qs, 0, -1) : '';
+        return $qs ? substr($qs, 0, -1) : '';
     }
 }
diff --git a/test/Api/CustomersApiTest.php b/test/Api/CustomersApiTest.php
index aff5371..663d9f3 100644
--- a/test/Api/CustomersApiTest.php
+++ b/test/Api/CustomersApiTest.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * CustomersApiTest
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Api/EshopApiTest.php b/test/Api/EshopApiTest.php
index e1686aa..ece0d8b 100644
--- a/test/Api/EshopApiTest.php
+++ b/test/Api/EshopApiTest.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * EshopApiTest
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Api/MasterDataApiTest.php b/test/Api/MasterDataApiTest.php
index b6e9477..4513b3d 100644
--- a/test/Api/MasterDataApiTest.php
+++ b/test/Api/MasterDataApiTest.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * MasterDataApiTest
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Api/ProductsApiTest.php b/test/Api/ProductsApiTest.php
index c9f8c1d..13ff421 100644
--- a/test/Api/ProductsApiTest.php
+++ b/test/Api/ProductsApiTest.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * ProductsApiTest
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Api/WelcomeApiTest.php b/test/Api/WelcomeApiTest.php
index 4ced0d1..636ba4c 100644
--- a/test/Api/WelcomeApiTest.php
+++ b/test/Api/WelcomeApiTest.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * WelcomeApiTest
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -17,7 +17,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/BillingTest.php b/test/Model/BillingTest.php
index 37b9471..02cf0a6 100644
--- a/test/Model/BillingTest.php
+++ b/test/Model/BillingTest.php
@@ -2,7 +2,7 @@
 /**
  * BillingTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CategoryDtoListPagedResponseTest.php b/test/Model/CategoryDtoListPagedResponseTest.php
index 6fad411..05b4dbb 100644
--- a/test/Model/CategoryDtoListPagedResponseTest.php
+++ b/test/Model/CategoryDtoListPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * CategoryDtoListPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CategoryDtoTest.php b/test/Model/CategoryDtoTest.php
index 486ecf8..91bf54c 100644
--- a/test/Model/CategoryDtoTest.php
+++ b/test/Model/CategoryDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * CategoryDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CouponTest.php b/test/Model/CouponTest.php
index ce8eca1..c98c266 100644
--- a/test/Model/CouponTest.php
+++ b/test/Model/CouponTest.php
@@ -2,7 +2,7 @@
 /**
  * CouponTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CouponsTest.php b/test/Model/CouponsTest.php
index 82b1a3f..54f2c58 100644
--- a/test/Model/CouponsTest.php
+++ b/test/Model/CouponsTest.php
@@ -2,7 +2,7 @@
 /**
  * CouponsTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CustomerDtoTest.php b/test/Model/CustomerDtoTest.php
index faa98da..9b6dc7e 100644
--- a/test/Model/CustomerDtoTest.php
+++ b/test/Model/CustomerDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * CustomerDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CustomerPagedResponseTest.php b/test/Model/CustomerPagedResponseTest.php
index a171227..2c21713 100644
--- a/test/Model/CustomerPagedResponseTest.php
+++ b/test/Model/CustomerPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * CustomerPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/CustomerTest.php b/test/Model/CustomerTest.php
index 144d51f..fab0929 100644
--- a/test/Model/CustomerTest.php
+++ b/test/Model/CustomerTest.php
@@ -2,7 +2,7 @@
 /**
  * CustomerTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/EOrderPagedResponseTest.php b/test/Model/EOrderPagedResponseTest.php
index 48e18d5..013c818 100644
--- a/test/Model/EOrderPagedResponseTest.php
+++ b/test/Model/EOrderPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * EOrderPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/EOrderStatusPagedResponseTest.php b/test/Model/EOrderStatusPagedResponseTest.php
index 0dda300..6f5c2ca 100644
--- a/test/Model/EOrderStatusPagedResponseTest.php
+++ b/test/Model/EOrderStatusPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * EOrderStatusPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/EOrderStatusTest.php b/test/Model/EOrderStatusTest.php
index 4f8dc7d..45f57fc 100644
--- a/test/Model/EOrderStatusTest.php
+++ b/test/Model/EOrderStatusTest.php
@@ -2,7 +2,7 @@
 /**
  * EOrderStatusTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/EOrderTest.php b/test/Model/EOrderTest.php
index 3a69359..ac75260 100644
--- a/test/Model/EOrderTest.php
+++ b/test/Model/EOrderTest.php
@@ -2,7 +2,7 @@
 /**
  * EOrderTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/FeeTest.php b/test/Model/FeeTest.php
index 13ec70b..767b517 100644
--- a/test/Model/FeeTest.php
+++ b/test/Model/FeeTest.php
@@ -2,7 +2,7 @@
 /**
  * FeeTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/FeesTest.php b/test/Model/FeesTest.php
index 4d86fd0..4fcb348 100644
--- a/test/Model/FeesTest.php
+++ b/test/Model/FeesTest.php
@@ -2,7 +2,7 @@
 /**
  * FeesTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/ItemTest.php b/test/Model/ItemTest.php
index 06f11af..6efeca6 100644
--- a/test/Model/ItemTest.php
+++ b/test/Model/ItemTest.php
@@ -2,7 +2,7 @@
 /**
  * ItemTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/ItemsTest.php b/test/Model/ItemsTest.php
index 4d6b440..1687fa6 100644
--- a/test/Model/ItemsTest.php
+++ b/test/Model/ItemsTest.php
@@ -2,7 +2,7 @@
 /**
  * ItemsTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/MainCategoryDtoPagedResponseTest.php b/test/Model/MainCategoryDtoPagedResponseTest.php
index 3d381b1..def5dce 100644
--- a/test/Model/MainCategoryDtoPagedResponseTest.php
+++ b/test/Model/MainCategoryDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * MainCategoryDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/MainCategoryDtoTest.php b/test/Model/MainCategoryDtoTest.php
index 1d6ef93..b99b427 100644
--- a/test/Model/MainCategoryDtoTest.php
+++ b/test/Model/MainCategoryDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * MainCategoryDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/OikosDtoPagedResponseTest.php b/test/Model/OikosDtoPagedResponseTest.php
index 4a1cd69..b87be27 100644
--- a/test/Model/OikosDtoPagedResponseTest.php
+++ b/test/Model/OikosDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * OikosDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/OikosDtoTest.php b/test/Model/OikosDtoTest.php
index 14beec7..68adc18 100644
--- a/test/Model/OikosDtoTest.php
+++ b/test/Model/OikosDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * OikosDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/OwnerDtoPagedResponseTest.php b/test/Model/OwnerDtoPagedResponseTest.php
index cd48323..0c798e3 100644
--- a/test/Model/OwnerDtoPagedResponseTest.php
+++ b/test/Model/OwnerDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * OwnerDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/OwnerDtoTest.php b/test/Model/OwnerDtoTest.php
index 4739690..956a1a5 100644
--- a/test/Model/OwnerDtoTest.php
+++ b/test/Model/OwnerDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * OwnerDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/PersonalCategoryDtoPagedResponseTest.php b/test/Model/PersonalCategoryDtoPagedResponseTest.php
index 91c67ee..513b894 100644
--- a/test/Model/PersonalCategoryDtoPagedResponseTest.php
+++ b/test/Model/PersonalCategoryDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * PersonalCategoryDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/PersonalCategoryDtoTest.php b/test/Model/PersonalCategoryDtoTest.php
index 098cd93..e551193 100644
--- a/test/Model/PersonalCategoryDtoTest.php
+++ b/test/Model/PersonalCategoryDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * PersonalCategoryDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/ProblemDetailsTest.php b/test/Model/ProblemDetailsTest.php
index e86b93e..633da0e 100644
--- a/test/Model/ProblemDetailsTest.php
+++ b/test/Model/ProblemDetailsTest.php
@@ -2,7 +2,7 @@
 /**
  * ProblemDetailsTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/ProductDtoPagedResponseTest.php b/test/Model/ProductDtoPagedResponseTest.php
index 957cb1e..bdb5e5c 100644
--- a/test/Model/ProductDtoPagedResponseTest.php
+++ b/test/Model/ProductDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * ProductDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/ProductDtoTest.php b/test/Model/ProductDtoTest.php
index 5ccdaeb..77f3fce 100644
--- a/test/Model/ProductDtoTest.php
+++ b/test/Model/ProductDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * ProductDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/ShippingTest.php b/test/Model/ShippingTest.php
index 6c72f32..e04ce81 100644
--- a/test/Model/ShippingTest.php
+++ b/test/Model/ShippingTest.php
@@ -2,7 +2,7 @@
 /**
  * ShippingTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/SubCategoryDtoPagedResponseTest.php b/test/Model/SubCategoryDtoPagedResponseTest.php
index 88b1de5..a123803 100644
--- a/test/Model/SubCategoryDtoPagedResponseTest.php
+++ b/test/Model/SubCategoryDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * SubCategoryDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/SubCategoryDtoTest.php b/test/Model/SubCategoryDtoTest.php
index cf7a440..9df131e 100644
--- a/test/Model/SubCategoryDtoTest.php
+++ b/test/Model/SubCategoryDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * SubCategoryDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/VatCategoryDtoPagedResponseTest.php b/test/Model/VatCategoryDtoPagedResponseTest.php
index 154682f..fd8d55d 100644
--- a/test/Model/VatCategoryDtoPagedResponseTest.php
+++ b/test/Model/VatCategoryDtoPagedResponseTest.php
@@ -2,7 +2,7 @@
 /**
  * VatCategoryDtoPagedResponseTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**
diff --git a/test/Model/VatCategoryDtoTest.php b/test/Model/VatCategoryDtoTest.php
index 065eb72..f8201ef 100644
--- a/test/Model/VatCategoryDtoTest.php
+++ b/test/Model/VatCategoryDtoTest.php
@@ -2,7 +2,7 @@
 /**
  * VatCategoryDtoTest
  *
- * PHP version 7.4
+ * PHP version 8.1
  *
  * @category Class
  * @package  Europharmacy\EuromedicaClient
@@ -18,7 +18,7 @@
  * The version of the OpenAPI document: v1
  * Contact: development@europharmacy.gr
  * Generated by: https://openapi-generator.tech
- * Generator version: 7.12.0
+ * Generator version: 7.20.0
  */
 
 /**