[Answered ]-Can not log in with unit test in django-allauth

That is what helped me with authentication

from django.contrib.auth import get_user_model 

class TestParent(TestCase):

  def setUp(self):
    username = 'testuser'
    password = 'testpass'
    User = get_user_model()
    user = User.objects.create_user(username, password=password)
    logged_in = self.client.login(username=username, password=password)
    self.assertTrue(logged_in)