Important: Make sure Odoo is correctly configured to send email before starting this tutorial. Odoo will need to email an activation link when you enable OAUTH.
So, lets get started.
Enabling OAuth Support in Odoo
Login to Odoo as the Administrator
Browse to Settings -> Apps
In the search box, clear the Apps filter
Search for OAuth2
Click Install to add the OAuth2 Authentication module
After Successful Installation Browse to Settings -> Configuration -> General Settings:
Allow external users to sign up ->check this (Required to provide Sign Up Facilty to other Users)
Allow users to sign in with Google.
Template user for new users created through signup must be Template User.
Enabling Google App Engine Admin Console
This step will be required only if You Wish to use it For Google Business App Account
Browse to https://admin.google.com and login as the Google domain adminstrator
Click More Controls at the bottom of the page
Click More Google Apps
Click the X next to Filter: Top featured services to clear the filter
Scroll down the list and click Google App Engine Admin Console