code: def fetch(self):
          
          response = self._session.get(self.url, params=self.params)
          response.raise_for_status()
          return response
docs: Makes a request to combined url with `self._params` as parameters.
          If the server at combined url responds with Client or Server error, raises an exception.
  
          :return: the response from combined url
          :rtype: requests.models.Response