code: def add_response(self, response):
          
          key = self.merge_array_field_name
          response_json = response.json()
          value = self.combined_json[key]
          self.combined_json[self.merge_array_field_name] = value + response_json[key]
docs: Add data from json() to data returned by json()
          :param response: requests.Response containing the successful JSON result to be merged