Lesson-17 adds the checkUser method to authMiddleware.js, the import for the User model is missing however.

don't know why the server is crashing even I followed all the steps followed by Shaun , please help me I am attaching the screenshot

MongoDB connection fails with error:

Error: querySrv ENOTFOUND _mongodb._tcp.cluster0.del96.mongodb.net
    at QueryReqWrap.onresolve [as oncomplete] (dns.js:206:19) {
  errno: undefined,
  code: 'ENOTFOUND',
  syscall: 'querySrv',
  hostname: '_mongodb._tcp.cluster0.del96.mongodb.net'
}

In lesson 1

localhost:3000 is not running and app is being crashed please help.

nodemon app.js

[nodemon] 2.0.7
[nodemon] to restart at any time, enter rs
[nodemon] watching path(s): .
[nodemon] watching extensions: js,mjs,json
[nodemon] starting node app.js
[nodemon] app crashed - waiting for file changes before starting...

took me 1 hr to find this issue in my code