def METHOD_NAME(self):
    external_actor, _ = ExternalActor.objects.get_or_create(
        actor_id=get_actor_id_for_user(self.user),
        user_id=self.user.id,
        organization=self.organization,
        integration_id=self.integration.id,
        provider=ExternalProviders.SLACK.value,
        external_name="Marcos",
        external_id="Gaeta",
    )
    result = serialize(external_actor, self.user, key="user")
    assert "actorId" not in result
    assert result["id"] == str(external_actor.id)
    assert result["externalName"] == "Marcos"
    assert result["externalId"] == "Gaeta"
    assert result["userId"] == str(self.user.id)