rework of hubs

packages/httpRequest/user.go

@@ -86,8 +86,8 @@ func HandleUserNew(response http.ResponseWriter, request *http.Request) {
 	}
 
 	username := request.FormValue("username")
-	if len(username) < 4 {
-		http.Error(response, "no or short username", http.StatusBadRequest)
+	if len(username) < 4 || len(username) > 30 {
+		http.Error(response, "no or short/too long username", http.StatusBadRequest)
 		return
 	}