django/tests/test_client_regress/models.py

from django.contrib.auth.models import AbstractBaseUser, BaseUserManager
from django.db import models


class CustomUser(AbstractBaseUser):
    email = models.EmailField(verbose_name='email address', max_length=255, unique=True)
    custom_objects = BaseUserManager()

    USERNAME_FIELD = 'email'

    class Meta:
        app_label = 'test_client_regress'