log.Printf("%s %s", r.Method, r.RequestURI)
		if r.RequestURI != "/" {
			http.NotFound(w, r)
			return
		}
		if clientSec != "" {
			http.Redirect(w, r, config.AuthCodeURL(state), http.StatusFound)
		} else {
			http.Redirect(w, r, implicitFlowURL(config, state), http.StatusFound)
		}
	})

	http.HandleFunc("/oauth2/callback", func(w http.ResponseWriter, r *http.Request) {