text: from django.db import models
  from django.contrib.auth.models import BaseUserManager, AbstractUser
  from django.contrib.staticfiles.storage import staticfiles_storage
  from django.utils.translation import gettext_lazy as _
  
  
  # Custom Auth
  # https://docs.djangoproject.com/fr/3.0/topics/auth/customizing/
  class UserManager(BaseUserManager):
      """Define a model manager for User model with no username field."""
  
      use_in_migrations = True
  
      def _create_user(self, email, password, **extra_fields):
          """Create and save a User with the given email and password."""
          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):
          """Create and save a regular User with the given email and password."""
          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):
          """Create and save a SuperUser with the given email and password."""
          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):
      email = models.EmailField(
          verbose_name=_("Adresse Email"),
          max_length=255,
          unique=True,
      )
      avatar = models.ImageField(
          verbose_name=_("Avatar"),
          upload_to='avatar',
          blank=True, null=True,
      )
      first_name = models.CharField(
          verbose_name=_("Prénom"),
          max_length=255,
      )
      last_name = models.CharField(
          verbose_name=_("Nom"),
          max_length=255,
      )
  
      username = None
      objects = UserManager()
  
      USERNAME_FIELD = 'email'
      REQUIRED_FIELDS = ['first_name', 'last_name', ]
  
      class Meta:
          verbose_name = _("Utilisateur")
          verbose_name_plural = _("Utilisateurs")
  
      def __str__(self):
          return self.email
  
      def get_fullname(self):
          return "%s %s" % (self.first_name, self.last_name)
  
      def get_avatar_url(self):
          if self.avatar and self.avatar.file:
              return self.avatar.url
          return staticfiles_storage.url('img/avatar.png')
  