code: async def remember(request, user_id):
      
      auth_policy = request.get(POLICY_KEY)
      if auth_policy is None:
          raise RuntimeError('auth_middleware not installed')
  
      return await auth_policy.remember(request, user_id)
docs: Called to store and remember the userid for a request
  
      Args:
          request: aiohttp Request object.
          user_id: String representing the user_id to remember
  
      Raises:
          RuntimeError: Middleware is not installed