The redirect URI in the request, https://www.dego.com/gpconnect.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/223885986912-u3f7t6014r518kl3or3i193d3eg3rkpk.apps.googleusercontent.com?project=223885986912