How do I Access multiple collections of database of mongoDB through node js when we are running app.js

Question

I want chat feature and login, register feature for the website I'm working on,

so is it necessary to have 2 collections separate for messages and login/register ,

if yes then how?
if no, then how?
thanks!

Answer 1

this might help

https://hackernoon.com/restful-api-design-with-node-js-26ccf66eab09

Answer 2

sure ,checking that, thanks!