code: def test_get_auth_url():
      auth_url = login.AuthServer().get_auth_url(1234)
      assert (
          auth_url
          == f"{LIGHTNING_CLOUD_URL}/sign-in?redirectTo=http%3A%2F%2Flocalhost%3A1234%2Flogin-complete"
      )
  
file_path: pytorch-lightning/tests/tests_app/utilities/test_login.py
imports: import os
  from unittest import mock
  import pytest
  import requests
  from lightning.app.utilities import login
label_desc: Use image node_id 4 for calling a global function with example usage: test_get_auth_url() without return types