Can't signup in module 3

[harishsainik]

I am beginner in Nodejs things and trying to learn through prebuilt apps. Got stuck at module 3 while making post request to http://localhost:3000/auth/signup with random username and password, I am getting redirected to /auth/failure and can't sign up. It may be because of an update. Can anybody tell me what changes should I make and in which files.