-`password_change_date` Date password was last changed.
-`attributes` Dynamic attributes.
-`pb_groups` This is a queryset of all the user's groups.
You can do additional filtering like `user.pb_groups.filter(name__startswith='test')`, see [here](https://docs.djangoproject.com/en/3.1/ref/models/querysets/#id4)
To get the name of all groups, you can do `[group.name for group in user.pb_groups.all()]`