The redirect URI in the request, https://babatunde.afrikrea.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/539281678148-tt40p3ti9ued7ldi25q23mnb74hpsh7j.apps.googleusercontent.com?project=539281678148