code: def created(self, data, schema=None, envelope=None):
          
  
          data = marshal(data, schema, envelope)
          return self.__make_response((data, 201))
docs: Gets a 201 response with the specified data.
  
          :param data: The content value.
          :param schema: The schema to serialize the data.
          :param envelope: The key used to envelope the data.
          :return: A Flask response object.