class MyUser(AbstractBaseUser, PermissionsMixin):
    USER_ACCOUNT_TYPE_CHOICES = (
        (1, _('organization')),
        (2, _('personal')),
    )

    user_account_type = models.IntegerField(_('account type'), choices=USER_ACCOUNT_TYPE_CHOICES)
    email = models.EmailField(_('email address'), max_length=255, unique=True)

class MyUserManager(BaseUserManager):
    def _create_user(self, email, password, username=None, **extra_fields):
        """
        Creates and saves a User with the given username, email and password.
        """
        if not email:
            raise ValueError('The given email must be set')
        email = self.normalize_email(email)
        if username:
            username = self.model.normalize_username(username)
            user = self.model(username=username, email=email, **extra_fields)
        else:
            user = self.model(email=email, **extra_fields)

        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_user(self, email=None, password=None, username=None, **extra_fields):
        extra_fields.setdefault('is_staff', False)
        extra_fields.setdefault('is_superuser', False)
        return self._create_user(email, password, username=username, **extra_fields)

    def create_superuser(self, email, password, username=None, **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, username=username, **extra_fields)