The redirect URI in the request, https://spho.to/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/536978593986-4ios98kqmr10d4k43ak4s31p88dsi36k.apps.googleusercontent.com?project=536978593986