text: const express = require('express');
  const courseRouter = express.Router();
  const courseController = require('../controllers/course');
  
  courseRouter.get('/courses', courseController.course);
  
  courseRouter.get('/courses/:courseId', courseController.course);
  
  courseRouter.post('/courses/:courseId/enroll', courseController.enroll);
  
  courseRouter.post('/courses/:courseId/unenroll', courseController.unenroll);
  
  courseRouter.post('/courses', courseController.add);
  
  courseRouter.delete('/courses/:courseId', courseController.delete);
  
  module.exports = courseRouter;