Using custom USER_MODEL with integer id when default one is uuid

[scherbakovx]

By default migrations use model from AUTH_USER_MODEL, in my case its id is UUID. But I want to use pushes for model where id is integer. When I create new migration and try to apply it, I get such error:

django.db.utils.ProgrammingError: cannot cast type uuid to integer
LINE 1: ...ALTER COLUMN "user_id" TYPE integer USING "user_id"::integer

I found solution for me, but it is rather bad.
Then I looked at migrations files of django-push-notifications and see this row in push_notifications/migrations/0001_initial.py:

('user', models.ForeignKey(blank=True, to=settings.AUTH_USER_MODEL, null=True, on_delete=models.CASCADE)),

I'm not sure but isn't better to change kwarg to to settings.PUSH_NOTIFICATIONS_SETTINGS["USER_MODEL"] which is anyway AUTH_USER_MODEL by default?

Environment:

Name	Version
Django	2.1.5
PostgreSQL	10.3
psycopg2-binary	2.7.7
django-push-notifications	2.0.0