I am tring to make " login with facebook" using Django. getting error – Facebook api

Making a project login with facebook. But it’s showing error

my localhost url — 127.0.0.1:8000/demo/index/

My code is like this

setting.py

INSTALLED_APPS = [

    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'social_django',
    'dashboard'
]


MIDDLEWARE = [

    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'social_django.middleware.SocialAuthExceptionMiddleware',
]


TEMPLATES = [

    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(os.path.join(BASE_DIR), 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'social_django.context_processors.backends',  # <--
                'social_django.context_processors.login_redirect',
            ],
        },
    },
]


AUTHENTICATION_BACKENDS = (

    'social_core.backends.facebook.FacebookOAuth2',
    'social_core.backends.google.GoogleOAuth2',
    'django.contrib.auth.backends.ModelBackend',
)


STATIC_URL = '/static/'

LOGIN_URL = '/demo/login/'

LOGIN_REDIRECT_URL = '/'

SOCIAL_AUTH_FACEBOOK_KEY = '184354188769721'
SOCIAL_AUTH_FACEBOOK_SECRET = 'c4d9ed712a59be2f9bb25b5368432f61'

LOGIN_URL = '/demo/login/'

LOGIN_REDIRECT_URL = '/'

url.py

url(r'^facebook/', include('social_django.urls', namespace='social')),

index.html

<a href="{% url 'social:begin' 'facebook' %}">Login with Facebook</a>

I created facebook API and set

domain – empty

site url – empty

in facebook login(plugins)

Valid OAuth redirect URIs – http://localhost:8000/_auth/facebook

Give solution wy its showing this error while login.

URL Blocked: This redirect failed because the redirect URI is not whitelisted in the app’s Client OAuth Settings. Make sure Client and Web OAuth Login are on and add all your app domains as Valid OAuth Redirect URIs.