text: import express from 'express';
  import { songRouter } from './resources/song';
  import { userRouter } from './resources/user/user.router';
  import { playListRouter } from './resources/playlist';
  
  export const restRouter = express.Router();
  // song route
  restRouter.use('/songs', songRouter);
  // user route
  restRouter.use('/users', userRouter);
  // playlist route
  restRouter.use('/playlist', playListRouter);