How To Set Up Your Own Google App (OpenID Connect): Bread & Butter

Log in to the Google Cloud Console:

https://console.cloud.google.com/

At the top of the page, click Select a Project, then New Project, if you have not already created a Project.

Click Create

In the left pane, click on APIs & Services, then OAuth consent screen.

For Application name, enter your organization’s name.
For Support email, enter your email address.
For Developer contact information, enter your email address.
For Authorized domains, add:

breadbutter.io
Enter the remaining fields for your organization as needed (please note that these can be changed later).
Click Save and Continue.

In the left pane, click on Credentials.

Click Create credentials, and then select OAuth client ID.

For Application type, select Web application.
For Name, enter your app name. We recommend entering your organization name.
For Authorized JavaScript origins, enter:

https://api.breadbutter.io
For Authorized redirect URIs, enter:

https://api.breadbutter.io/callback
Click Create.

In the dialog that appears, take note of the Client ID and Client Secret.

Go to https://app.breadbutter.io/sign-in/
Click Sign In and authenticate (or Sign Up make a new account and authenticate).
Go to Settings in the left menu.
Click on the Google button under SSO Settings > Enterprise Accounts.
Choose OpenID Connect for the protocol.
Enter a name.
Enter a description (optional).
In the Login URL field, enter:

https://accounts.google.com/o/oauth2/v2/auth
In the Token URL field, enter:

https://oauth2.googleapis.com/token
Enter the Client ID from the Google OAuth setup steps above.
Enter the Client Secret from the Google OAuth setup steps above.
Click Save.
Enable Google by clicking the new entry in the Google Identity Providers list.