code: def _request(self, request, proxies, timeout, verify, **_):
          
  
          settings = self.http.merge_environment_settings(
              request.url, proxies, False, verify, None)
  
          self._delay()
          response = self.http.send(
              request, timeout=timeout, allow_redirects=False, **settings)
          self._update(response.headers)
  
          return response
docs: This is where we apply rate limiting and make the HTTP request.