text: from django.db import models
  from django.contrib.auth.models import AbstractUser, BaseUserManager
  from django.utils.translation import ugettext as __
  
  
  # Create your models here.
  class UserManager(BaseUserManager):
  
      use_in_migrations = True
  
      def _create_user(self, email, password, **extra_fields):
          if not email:
              raise ValueError('Email field is required')
  
          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, **extra_fields):
          extra_fields.setdefault('is_staff', False)
          extra_fields.setdefault('is_superuser', False)
          return self._create_user(email=email, password=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_staff') is not True:
              raise ValueError('Superuser must have is_superuser=True')
  
          return self._create_user(email=email, password=password, **extra_fields)
  
  
  class User(AbstractUser):
  
      username = None
      email = models.EmailField(__('Email address'), unique=True)
  
      USERNAME_FIELD = 'email'
      REQUIRED_FIELDS = []
  
      objects = UserManager()
  