text: const router = require('express').Router();
  let User = require('../models/user.model');
  
  router.route('/').get((req, res) => {
      User.find()
          .then(users => res.json(users))
          .catch(err => res.status(400).json('Error: ' + err));
  });
  
  router.route('/add').post((req, res) => {
      const username = req.body.username;
  
      const newUser = new User({
          username
      });
  
      newUser.save()
          .then(() => res.json('User added!'))
          .catch(err => res.status(400).json('Error: ' + err));
  });
  
  module.exports = router;