Getting an error to run NPM with HTTPS?

I have define options for SSL certificate but I don't how can I use it in code. so I am not getting proper result with HTTPS URL. Here is my code: 'use strict'; const express = require('express'); const https = require('https'), fs = require("fs"); const socketio = require('[login to view URL]'); const socketEvents = require('./utils/socket'); const options = { key: [login to view URL]("/www/wwwroot/[login to view URL]"), cert: [login to view URL]("/www/wwwroot/[login to view URL]") }; class Server { constructor() { [login to view URL] = [login to view URL] || 8099; [login to view URL] = [login to view URL] || '[login to view URL]'; [login to view URL] = express(); [login to view URL] = [login to view URL]([login to view URL]); [login to view URL] = socketio([login to view URL]); } appRun(){ new socketEvents([login to view URL]).socketConfig(); [login to view URL]([login to view URL](__dirname + '/uploads')); [login to view URL]([login to view URL], [login to view URL], () => { [login to view URL](`Listening on https://${[login to view URL]}:${[login to view URL]}`); }); } } const app = new Server(); [login to view URL]();