text: from django.contrib.auth.models import AbstractUser, BaseUserManager
  from django.utils import timezone
  from django.db import models
  from django.utils.translation import ugettext_lazy as _
  
  
  class UserManager(BaseUserManager):
  
      use_in_migrations = True
  
      def _create_user(self, email, password, **extra_fields):
          if not email:
              raise ValueError('The given email must be set')
          email = self.normalize_email(email)
          user = self.model(email=email, **extra_fields)
          user.set_password(password)
          user.save(using=self._db)
          return user
  
      def create_user(self, email, password=None, **extra_fields):
          extra_fields.setdefault('is_staff', False)
          extra_fields.setdefault('is_superuser', False)
          return self._create_user(email, password, **extra_fields)
  
      def create_superuser(self, email, password, **extra_fields):
          extra_fields.setdefault('is_staff', True)
          extra_fields.setdefault('is_superuser', True)
          if extra_fields.get('is_staff') is not True:
              raise ValueError('Superuser must have is_staff=True.')
          if extra_fields.get('is_superuser') is not True:
              raise ValueError('Superuser must have is_superuser=True.')
          return self._create_user(email, password, **extra_fields)
  
  
  class User(AbstractUser):
      """User model"""
  
      username = None
      email = models.EmailField(_('email address'), unique=True)
      date_added = models.DateTimeField(default=timezone.now)
      is_active = models.BooleanField(default=True)
      is_staff = models.BooleanField(default=False)
      first_name = models.CharField(_('first name'), max_length=20, blank=True)
      middle_name = models.CharField(_('middle name'), max_length=20, blank=True)
      second_name = models.CharField(_('second name'), max_length=20, blank=True)
      phone = models.CharField(_('phone'), max_length=12, blank=True)
  
      USERNAME_FIELD = 'email'
      REQUIRED_FIELDS = []
  
      objects = UserManager()
  