Improve logging and change error value

main.go

@@ -19,6 +19,8 @@ var (
 func main() {
 	flag.Parse()
 
+	log.Printf("Starting on 127.0.0.1:%d\n", *port)
+
 	http.HandleFunc("/", authHandlerFunc)
 	log.Fatal(http.ListenAndServe(
 		fmt.Sprintf("127.0.0.1:%d", *port),
@@ -50,15 +52,17 @@ func authHandlerFunc(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "internal server error", http.StatusInternalServerError)
 		return
 	}
+
 	switch resp.Status {
 	case auth.StatusOK:
 		w.WriteHeader(http.StatusOK)
 		return
 	case auth.StatusInsufficientCredentials:
-		http.Error(w, "wrong credentials", http.StatusForbidden)
+		http.Error(w, "not allowed", http.StatusForbidden)
 		return
 	case auth.StatusError:
-		http.Error(w, "internal server error", http.StatusInternalServerError)
+		log.Printf("status (user: %s): %s", p.User, resp.Status)
+		http.Error(w, "unauthorized", http.StatusUnauthorized)
 		return
 	}
 }