code: def _process_response(self, response, object_mapping=None):
          
          try:
              pretty_response = response.json()
          except ValueError:
              pretty_response = response
          for handler in self._response_handlers:
              if handler.applies_to(self, response):
                  log.debug("{} matched: {}".format(handler.__name__, pretty_response))
                  r = handler(self, object_mapping).build(response)
                  self._clean_dirty_objects()
                  return r
          raise ZenpyException("Could not handle response: {}".format(pretty_response))
docs: Attempt to find a ResponseHandler that knows how to process this response.
          If no handler can be found, raise an Exception.