如何通过feathersjs客户端知道服务路径是否无效？

const feathers = require('@feathersjs/feathers');
const socketio = require('@feathersjs/socketio-client');
const io = require('socket.io-client');

const socket = io('http://localhost:3030'); // 替换为你的服务端地址
const app = feathers();

app.configure(socketio(socket));

const userService = app.service('users');

userService.find()
  .then(result => {
    console.log('服务路径有效');
  })
  .catch(error => {
    console.error('服务路径无效');
  });

const userService = app.service('users');

userService.timeout = 5000; // 设置超时时间为5秒

userService.find()
  .then(result => {
    console.log('服务路径有效');
  })
  .catch(error => {
    console.error('服务路径无效');
  });