main.js

#!/usr/bin/env nodejs

var express = require('express');
var app = express();
var http = require('http').Server(app);
const { Octokit } = require("@octokit/rest");
var bodyParser = require('body-parser');
var expressIp = require('express-ip');

// Remember to add ".env" to ".gitignore" before
// pushing to your own repository !!
const ORGANIZATION = process.env.ORGANIZATION;
const TOKEN = process.env.TOKEN;

var PORT = process.env.PORT;

app.use(express.static('public'));
app.use(bodyParser.urlencoded({ extended: true }));
app.use(expressIp().getIpInfoMiddleware);

app.set('PORT', PORT);

app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');
    const userInfo = req.ipInfo;
    console.log('User connected from %s, %s', userInfo.city, userInfo.country);
    console.log('User details = %o', userInfo);
});

app.get('/input_data', function (req, res) {
    res.sendFile(__dirname + '/index.html');
});
var client = new Octokit({
    auth: TOKEN
});

app.post('/input_data', (req, res) => {
    if (req.body.handle === '') res.redirect('back');
    client.users
        .getByUsername({
            username: req.body.handle
        })
        .then((userdata) => {
            client.orgs
                .createInvitation({
                    org: ORGANIZATION,
                    email: req.body.email
                })
                .then((invitationData) => {
                    console.log(invitationData);
                    console.log('Invitation sent to %s At : %s', req.body.handle, req.body.email);
                    res.send(`Invitation sent to ${req.body.handle} At : ${req.body.email}`);
                })
                .catch((error) => {
                    console.log('Invitation failed %o', error)
                    res.redirect('back')
                })
            console.log(userdata)
        })
        .catch((error) => {
            console.log('User not found %o', error)
            res.redirect('back')
        });
});

http.listen(app.get('PORT'), function () {
    console.log('listening on : %s', app.get('PORT'));
});