Provides automatic authentication against Google OAuth2 API.
google-oauth.php to the
Activate the plugin through the 'Plugins' menu in WordPress
Log in to Google App Cloud Console with administrative privileges and setup the app for
OAuth2 authentication (https://developers.google.com/accounts/docs/OAuth2Login).
It will require you to provide redirect URLs - http URL is available at the plugin settings page, and you’ll need another one for HTTPS (same URL, just starting with https://).
After all that is done, Google will provide Client ID and Client Secret values you’ll need to copy-paste into respective fields on the plugin settings page and set the Allowed Domain.