making email the default custromuser django code example

Example 1: django user fields

# Django User Model Fields
username
first_name
last_name
email
password
groups
user_permissions
is_staff
is_active
is_superuser
last_login
date_joined

Example 2: django authenticate with email

from django.contrib.auth import get_user_model
from django.contrib.auth.backends import ModelBackend

class EmailBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        UserModel = get_user_model()
        try:
            user = UserModel.objects.get(email=username)
        except UserModel.DoesNotExist:
            return None
        else:
            if user.check_password(password):
                return user
        return None