The redirect URI in the request, https://forum.gamesource.it/connected_account.php, does not match the ones authorized for the OAuth client. To update the authorized redirect URIs, visit: https://console.developers.google.com/apis/credentials/oauthclient/624694417100-1p218oesdf2b5bkccd0nuk1568u3kdbc.apps.googleusercontent.com?project=624694417100