How to use the impostor.models.ImpostorLog.objects.count function in Impostor

def test_login_admin_as_user(self):
        """
        checks that an admin user can impersonate a regular user via impostor backend
        and that the login get reflected into the ImpostorLog table
        :return:
        """
        assert ImpostorLog.objects.count() == 0

        composed_username = '{} as {}'.format(admin_username, user_username)
        u = authenticate(username=composed_username, password=admin_pass)
        real_user = get_user_model().objects.get(username=user_username)
        assert u == real_user

        # Check if logs contain an entry now
        logs_entries = ImpostorLog.objects.all()
        assert len(logs_entries) == 1

        entry = logs_entries[0]
        # today = datetime.date.today()
        # lin = entry.logged_in
        assert entry.impostor.username == admin_username
        assert entry.imposted_as.username == user_username

:param first_user:
        :param password:
        :param impersonated_user:
        :param expected:
        :param custom_settings:
        :param rf:
        :return:
        """
        setattr(rf, 'META', {})
        rf.META['HTTP_X_FORWARDED_FOR'] = '127.0.0.1,192.168.0.1'
        assert ImpostorLog.objects.count() == 0
        composed_username = '{} as {}'.format(first_user.username, impersonated_user.username)
        authenticated_user = authenticate(request=rf, username=composed_username, password=password)
        if expected == 'ok':
            assert authenticated_user == impersonated_user
            assert ImpostorLog.objects.count() == 1
            log = ImpostorLog.objects.first()
            assert log.impostor == first_user
            assert log.imposted_as == impersonated_user
            assert log.impostor_ip == '127.0.0.1'
        else:
            assert authenticated_user is None