class AccountManager(models.Manager):
    """
    The class that handles activation
    """
    def register(self, **kwargs):
        username, email, password = kwargs['username'], kwargs['email'], kwargs['password1']
        return self.create_inactive_user(username, email, password)

    def create_inactive_user(self, username, email, password):
        new_user = User.objects.create_user(username, email, password)
        new_user.is_active = False
        new_user.save()
        account_registration = self.create_activation_key(new_user)
        return new_user

    def create_activation_key(self, user):
        salt = sha_constructor(str(random.random())).hexdigest()[:5]
        username = user.username.encode('utf-8')
        activation_key = sha_constructor(salt+username).hexdigest()
        return self.create(user=user, activation_key=activation_key)

class AccountRegistration(models.Model):
    """
    The class that saves an activation key
    """
    user = models.ForeignKey(User, unique=True, verbose_name='user')
    activation_key = models.CharField('activation key', max_length=40)

    objects = AccountManager()