The redirect URI in the request, http://financeforfounders.com/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/157366090148-bk3apfcspqrpi3pracila7s7m2f591k5.apps.googleusercontent.com?project=157366090148