text: 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'
  