code: def append_response_error_content(response, **kwargs):
      
      if response.status_code >= 400:
          try:
              resp_dict = response_to_json_dict(response)
              error = resp_dict.get('error', '')
              reason = resp_dict.get('reason', '')
              # Append to the existing response's reason
              response.reason += ' {0} {1}'.format(error, reason)
          except ValueError:
              pass
      return response
docs: Provides a helper to act as callback function for the response event hook
      and add a HTTP response error with reason message to ``response.reason``.
      The ``response`` and ``**kwargs`` are necessary for this function to
      properly operate as the callback.
  
      :param response: HTTP response object
      :param kwargs: HTTP request parameters