AI-128: Regenerate SDK (#9)

* AI-128: Regenerate SDK

* feat: Add generated code for ApiKeyCreateResponse, ApiKeyRequest, and ApiKeyResponse

This commit adds the generated code for three classes: `ApiKeyCreateResponse`, `ApiKeyRequest`, and `ApiKeyResponse`. These classes are used in the API key functionality of the application. The generated code includes getters, setters, constructors, and other necessary methods for these classes.

The changes include:
- Added the generated code for `ApiKeyCreateResponse`
- Added the generated code for `ApiKeyRequest`
- Added the generated code for `ApiKeyResponse`

---------

Co-authored-by: Franklin <franklin.carrero@conekta.com>

Author: nicocedron

lib/src/model/order_refund_request.dart

@@ -59,7 +59,7 @@ class _$OrderRefundRequestSerializer implements PrimitiveSerializer<OrderRefundR
       yield r'expires_at';
       yield serializers.serialize(
         object.expiresAt,
-        specifiedType: const FullType.nullable(int),
+        specifiedType: const FullType(int),
       );
     }
     yield r'reason';
@@ -100,9 +100,8 @@ class _$OrderRefundRequestSerializer implements PrimitiveSerializer<OrderRefundR
         case r'expires_at':
           final valueDes = serializers.deserialize(
             value,
-            specifiedType: const FullType.nullable(int),
-          ) as int?;
-          if (valueDes == null) continue;
+            specifiedType: const FullType(int),
+          ) as int;
           result.expiresAt = valueDes;
           break;
         case r'reason':