new_contents: from app.models import Users
  from app.service import UsersService
  from app.service_tests.service_test_case import ServiceTestCase
  
  
  class UsersServiceTests(ServiceTestCase):
      def test_add_user_to_database(self):
          test_email = 'jake@jake.jake'
          test_nickname = 'Jake'
          test_fake_hash_password = 'pass'
  
          UsersService.add_user_to_database(test_email, test_nickname, test_fake_hash_password)
          actual_user = list(Users.query.all())[0]
  
          self.assertEqual(actual_user.email, test_email)
          self.assertEqual(actual_user.nickname, test_nickname)
          self.assertEqual(actual_user.password, test_fake_hash_password)
subject: add user to database service test works