AbstractUser is not effective

[xuqiang-idotools]

Found a bug? Please fill out the sections below.

Issue Summary

I found the model "oscar.apps.customer.abstract_models.AbstractUser" is not be registered.
So the model "django.contrib.auth.models.AbstractUser" is being used.
Is it losing the register code like this :

if not is_model_registered("customer", "User"):

class User(abstract_models.AbstractUser):
    pass

__all__.append("User")

And I subclass the AbstractUser, got the error: "ValueError: Related model 'customer.user' cannot be resolved" on migrating.
I like a circle denpendency by "customer.0001_initial.py".

Steps to Reproduce

Technical details

• Python version: Python 3.12.3
• Django version: Version: 4.2.11
• Oscar version: Version: 3.2.4

[joeyjurjens]

I don't think the AbstractUser model is used by default and that they make use of Django's own setting to customize the user model (AUTH_USER_MODEL);
https://django-oscar.readthedocs.io/en/3.0.0/howto/use_a_custom_user_model.html

See the #Example section
https://django-oscar.readthedocs.io/en/3.2.4/howto/use_a_custom_user_model.html#example

Keep in mind that if you already have dependencies on the user model you might run into issues, read;
https://docs.djangoproject.com/en/5.0/ref/settings/#auth-user-model