fix follows default argument

Author: itelo

seamapi/types.py

@@ -194,10 +194,10 @@ class AccessCode:
     access_code_id: str
     device_id: str
     type: str
-    code: Optional[str] = None
-    created_at: str = None
+    created_at: str
     errors: List[Dict[str, Any]]
     warnings: List[Dict[str, Any]]
+    code: Optional[str] = None
     starts_at: Optional[str] = None
     ends_at: Optional[str] = None
     name: Optional[str] = ""