Django User Manager

gistfile1.py

from django.contrib.auth.models import User, UserManager
from django.http import HttpResponse, HttpResponseNotFound


# Simple Error 
class UserExists(Exception):
    pass


# Model Manager
class MyUserManager(UserManager):
    def create_user(self, email, password):

        qs = super(MyUserManager, self).get_query_set()

        try:
            qs.get(email=email.lower())
            raise UserExists

        except User.DoesNotExist:
            user = super(MyUserManager, self).create_user(
                email=email.lower(),
                username=email,
                password=password)

        return user


# Model
class MyUser(User):
    # ... Your sutff here ...

    objects = MyUserManager()
    

# View
def your_view_function(request, *args, **kwargs):
    # Do some parameter validation
    try:
        MyUser.objects.create_user(username, password)
    except UserExists:
        return HttpResponseNotFound("<h1>User exists</h1>")
    
    return HttpResponse("<h1>User created!</h1>")