new_contents: from django.test import TestCase
  from django.test.client import Client
  
  class TestViewIndex(TestCase):
      def setUp(self):
          self.client = Client()
  
      def test_get_user_index_request_should_return_200(self):
          response = self.client.get("/users/")
          self.assertEqual(response.status_code, 200)
  
subject: add test : user index page should return 200