[Answered ]-Django Rest Framework extending user model, how to create user

To create UserDetails in your view

 user = User.objects.get(id=id)
 UserDetails.objects.create(id=user.id,user=user,extA=your_val_1,extB=your_val_2)

And then you should be able to refer it as user.userdetails.extA, user.userdetails.extB