How to use a function returned by another function as a handler?

Question

JavaScript

I'm learning nodejs, now I'm trying to organize routes on express in a way similar to laravel. Code example:

// Router
const controller = require('../controllers/index')
module.exports = (app) => {
  app.get('/users', controller('[email protected]'))
}

// Controller index aka controller()
const fs = require('mz/fs')
module.exports = (handler) => {
  const [controller, method] = handler.split('@')
  const controllers = fs
    .readdirSync(__dirname)
    .filter((v) => v !== __filename.slice(__dirname.length + 1))
    .map(v=> v.slice(0,-3))

  if (controllers.includes(controller)) {
    return require(`./${controller}`)[method]
  } else {
    console.error(`Controller with name ${controller} doesnt exist!`)
  }
}

The question is how to rewrite it correctly so that the handler was correctly passed to the route?
upd: The idea is to make the get() method pass the arguments to whatever function the controller() will return