def test_regsitration_activation_key(self, api_client, user):
        """
        Test that registration activation key has a value.

        UserFactory does not auto-generate registration object for the test users.
        It is created only for users that signup via email/API.  Therefore, activation key has to be tested manually.
        """
        self.create_user_registration(self.user)

        client = self.login_client(api_client, user)
        response = self.send_get(client)

        assert response.data["activation_key"] is not None