code: async def process_response(self, request, response):
          
          await super().process_response(request, response)
          if COOKIE_AUTH_KEY in request:
              if response.started:
                  raise RuntimeError("Cannot save cookie into started response")
  
              cookie = request[COOKIE_AUTH_KEY]
              if cookie == '':
                  response.del_cookie(self.cookie_name)
              else:
                  response.set_cookie(self.cookie_name, cookie)
docs: Called to perform any processing of the response required.
  
          This function stores any cookie data in the COOKIE_AUTH_KEY as a
          cookie in the response object. If the value is a empty string, the
          associated cookie is deleted instead.
  
          This function requires the response to be a aiohttp Response object,
          and assumes that the response has not started if the remember or
          forget functions are called during the request.
  
          Args:
              request: aiohttp Request object.
              response: response object returned from the handled view
  
          Raises:
              RuntimeError: Raised if response has already started.