About: https://github.com/Piwigo/Piwigo-Social-Connect/pull/27
This updates Hybridauth to 3.8.1:
Hybridauth to 3.8.1(for google authentication issues with old version - this one works fine)
oauth_id column value was changed to provider---user_email
google redirect uri should be - http://{app_url}/plugins/oAuth/auth.php?provider=Google