1. Go to google cloud console -> Your Project -> credentials & introduce the following settings variables with the values from the client credentials page: GAPPS_CLIENT_ID, GAPPS_CLIENT_SECRET, GAPPS_REDIRECT_URI, GAPPS_TOKEN_URI, GAPPS_AUTH_URI & GAPPS_SCOPE

2. Define two more settings variables GAPPS_LOGIN_SUCCESS_HANDLER & GAPPS_USER_FUNCTION referring to the function locations in your app.

3. pip install https://github.com/Aplopio/django_gapps_oauth2_login/archive/v0.9.7.6.tar.gz

4. Add django_gapps_oauth2_login to INSTALLED_APPS in settings.py

5. Update urls.py by adding following entry:

(r'^oauth2/', include('django_gapps_oauth2_login.urls'))

5. run python manage.py syncdb

6. Run testcases, python manage.py test django_gapps_oauth2_login

Oauth2 Login module has two views login_begin & auth_required.

login_begin - this view is called by the google markeplace url ( /oauth2/login/?domain=${DOMAIN_NAME} )

domain is optional parameter if it is present it will be considered as Hosted Domain for GApps action is optional paramater which is passed on to GAPPS_USER_FUNCTION auth_required - this view is called by google after proper authentication ( we give it as redirect_uri to google: /oauth2/oauth2callback )

For the first time when a user installs your google app, it lands to login_begin & after taking appropriate authentication access, it get's redirected to auth_required view.

Once the user is created or referenced, GAPPS_USER_FUNCTION. is called

Once the user is authenticated, GAPPS_LOGIN_SUCCESS_HANDLER. is called

All you will have to hook up appropriate functions for these signals

More here: http://wimprint.com/~vivek/log-52 and https://developers.google.com/api-client-library/python/guide/aaa_oauth