Django admin interface: the "groups" page extension shows its users and allows you to add new users

In the default admin interface, the group page is not very complete. (attached to the picture) I do not see users who are part of this group and I cannot add users there (I need to go to the user profile and add them to the group one by one)

I tried to extend this functionality from admin.py

but not sure how. If auth_group

, auth_user

and auth_user_groups

were user-defined models in models.py

, I would probably do something like this:

from django.contrib import admin
from myproject.models import Group, User, GroupUserMembership 

class MembershipInline(admin.TabularInline):
    model = GroupUserMembership
    extra = 1

class UserAdmin(admin.ModelAdmin):
    inlines = (MembershipInline,)

class GroupAdmin(admin.ModelAdmin):
    inlines = (MembershipInline,)

admin.site.register(Group, GroupAdmin)
admin.site.register(User, UserAdmin)

      

        
        
        
      

    

But this will lead to

Exception Value: The model Group is already registered

(also i don't know how to import auth_user_groups

)

TL; DR . How do I extend Django's admin interface to map a many-to-many relationship between the default auth models User

and Groups

? (for example, Permissions

in the picture below)