The redirect URI in the request, http://reusta.com/users/auth/google_oauth2/callback, 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/629054376141-khao2ulmueib8eqnqlhv17utprul9hge.apps.googleusercontent.com?project=629054376141