class User(AbstractUser):
    COMPANY = 1
    USER = 2
    USER_TYPE_CHOICES = (
        (COMPANY, _('Company')),
        (USER, _('User')),
    )
    username = None
    phone = models.CharField(max_length=12, unique=True)
    user_type = models.PositiveSmallIntegerField(choices=USER_TYPE_CHOICES, default=USER)
    first_name = models.CharField(_('first name'), max_length=30, blank=True)
    last_name = models.CharField(_('last name'), max_length=30, blank=True)
    date_joined = models.DateTimeField(_('date joined'), auto_now_add=True)
    is_active = models.BooleanField(_('active'), default=True)
    avatar = models.ImageField(upload_to='avatars/', null=True, blank=True)

    USERNAME_FIELD = 'phone'
    objects = UserManager()

    class Meta:
        verbose_name = _('user')
        verbose_name_plural = _('users')

    def __str__(self):
        return self.phone