Is there a way to define configuration structure for intellisense with "config" npm package?

Question

I am using config module from npm with JS or TS. let's imagine I have the following default.json:

{
  "database": {
    "username": "admin",
    "password": "admin"
 }
}

then somewhere in my code I write

import config from "config";
// ...
config.get('database.username') //

Thing I would like to have is some kind of hint during coding of what I can get from config. I can think of usage of constants like

const CONFIG = {
  DATABASE: {
    USERNAME: "database.username",
    PASSWORD: "database.password"
  }
}
// and then
const { DATABASE } = CONFIG;
config.get(DATABASE.USERNAME)

but maybe there is some other way, more automatic than manual as we already have this information in configuration files.

Is there a way to achieve this?