from django.contrib.auth.models import (AbstractUser, User, UserManager, Group, 

    BaseUserManager)

from django.utils import timezone

class LdtUserManager(BaseUserManager):    

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

        """

        Creates and saves a User with the given username, email and password.

        """

        now = timezone.now()

        if not username:

            raise ValueError('The given username must be set')

        email = UserManager.normalize_email(email)

        user = self.model(username=username, email=email,

                          is_staff=False, is_active=True, is_superuser=False,

                          last_login=now, date_joined=now, **extra_fields)

        user.set_password(password)

        user.save(using=self._db)

        everyone, _ = Group.objects.get_or_create(name=settings.PUBLIC_GROUP_NAME)

        user.groups.add(everyone)

        return user

    def create_superuser(self, username, email, password, **extra_fields):

        u = self.create_user(username, email, password, **extra_fields)

        u.is_staff = True

        u.is_active = True

        u.is_superuser = True

        u.save(using=self._db)

        return u

class LdtUser(AbstractUser):

    language = models.CharField(max_length=2, default=settings.LANGUAGE_CODE[:2])    

    image = ImageField(upload_to=settings.MEDIA_ROOT+"thumbnails/users/", default=settings.DEFAULT_USER_ICON, max_length=200)

    objects = LdtUserManager()

Group.add_to_class("get_profile", get_profile)  # @UndefinedVariable