settings.py

import os

from django.utils._os import upath

AUTH_MIDDLEWARE_CLASSES = [
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
]

AUTH_TEMPLATES = [{
    'BACKEND': 'django.template.backends.django.DjangoTemplates',
    'DIRS': [os.path.join(os.path.dirname(upath(__file__)), 'templates')],
    'APP_DIRS': True,
    'OPTIONS': {
        'context_processors': [
            'django.contrib.auth.context_processors.auth',
            'django.contrib.messages.context_processors.messages',
        ],
    },
}]