The redirect URI in the request, https://whatupintown.com/de/accounts/google/login/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/1045930503605-lepmrrqfo96r0db7k9mlcseumjsc9pef.apps.googleusercontent.com?project=1045930503605