Creating the User and Superuser

class UserManager(BaseUserManager):
    def get_object_by_public_id(self, public_id):
        try:
            instance = self.get(public_id=public_id)
            return instance
        except (ObjectDoesNotExist, ValueError, TypeError):
            return Http404
    def create_user(self, username, email, password=None, **kwargs):
        """Create and return a `User` with an email, phone number, username and password."""
        if username is None:
            raise TypeError('Users must have a username.')
        if email is None:
            raise TypeError('Users must have an email.')
        if password is None:
            raise TypeError('User must have an email.')
        user = self.model(username=username, email=self.normalize_email(email), **kwargs)
        user.set_password(password)
        user.save(using=self._db)
        return user
    def create_superuser(self, username, email, password, **kwargs):
        """
        Create and return a `User` with superuser (admin) permissions.
        """
        if password is None:
            raise TypeError('Superusers must have a password.')
        if email is None:
            raise TypeError('Superusers must have an email.')
        if username is None:
            raise TypeError('Superusers must have an username.')
        user = self.create_user(username, email, password, **kwargs)
        user.is_superuser = True
        user.is_staff = True
        user.save(using=self._db)
        return user