BUG Custom User Model in Django E039

[teury]

This happens when you have a custom user model in django

<class 'avatar.admin.AvatarAdmin'>: (admin.E039) An admin for model 
"User" has to be registered to be referenced by AvatarAdmin.autocomplete_fields.

django-avatar/avatar/admin.py

Line 13 in 8fa396f

autocomplete_fields = ("user",)

Apparently it was caused by this commit. #219

[johanneswilm]

Hey @teury,
it should be possible to use a custom user model here - I have done that. But you need to register the user model in the admin somewhere. Else it doesn't know how to show the admin screen.