Follow these steps to configure an OpenID Connect Single sign-on (SSO) identity on
Google.
- 
Go to the Google developer console page https://console.developers.google.com/
 - 
Create a new project (or use an existing one)
 - 
From the project page select Credentials.
 - 
In the Credentials page, select OAuth client ID
from the Create credentials drop-down menu.
This opens the 
Create OAuth client ID page where you select a product
type and create a client identity. For more information and help creating the client id, refer to
the 
OpenID Connect page in the Google documentation. 
 
- 
Choose Web Application as product
 
- 
In the Authorized JavaScript origins field, specify your JavaScript
hostname (for example, https://host:port/gas)
 
- 
In the Authorized redirect URIs field, specify the URI redirection where
the GAS is listening for the response (i.e.
https://host:port/gas/ws/r/services/OpenIDConnectServiceProvider/oauth2callback)
 
- 
Click Create.
 
The OAuth2 
Client and 
Client Secret IDs
are displayed.
 
 
   You have now set up Google as your IdP for your Web services to use OpenID Connect SSO.