Slightly reworked imports in contrib.auth.__init__

import re

from django.contrib.auth.signals import user_logged_in, user_logged_out, user_login_failed

from django.conf import settings

from django.core.exceptions import ImproperlyConfigured, PermissionDenied

from django.utils.module_loading import import_by_path

from .signals import user_logged_in, user_logged_out, user_login_failed

SESSION_KEY = '_auth_user_id'

BACKEND_SESSION_KEY = '_auth_user_backend'

REDIRECT_FIELD_NAME = 'next'

def get_backends():

    from django.conf import settings

    backends = []

    for backend_path in settings.AUTHENTICATION_BACKENDS:

        backends.append(load_backend(backend_path))

def get_user_model():

    "Return the User model that is active in this project"

    from django.conf import settings

    from django.db.models import get_model

    try:

def get_user(request):

    from django.conf import settings

    from django.contrib.auth.models import AnonymousUser

    from .models import AnonymousUser

    try:

        user_id = request.session[SESSION_KEY]

        backend_path = request.session[BACKEND_SESSION_KEY]