new_contents: from .utils import BaseTestCase as TestCase
  from core.models import User
  
  
  class UserManagerTestCase(TestCase):
      def setUp(self):
          self.manager = User.objects
  
      def test_create_user(self):
          self.assertFalse(self.manager.all().exists())
          email = 'test@email.com'
          password = 'testpass'
          self.manager.create_user(email, password)
          self.assertExists(User, email=email)
  
subject: Add managers tests