oauth discord

discordAuth.js

const express = require('express');
const btoa = require('btoa');
const fecth = require('node-fetch');

const app = express();

const idDiscord = 'xxxxxxxxxxxxxxxx';
const secretDiscord = 'xxxxxxxxxxxxxxxx';
const redirect = 'http://localhost:3000/callback';


app.get('/', (req,res)=>{
    res.send("OK");
});

app.get('/login', (req,res)=>{
    res.redirect(`https://discordapp.com/api/oauth2/authorize?client_id=${idDiscord}&redirect_uri=${redirect}&response_type=code&scope=guilds%20identify%20email`);
});

app.get('/login/:token', async(req,res)=>{
    const response = await fecth(`https://discordapp.com/api/users/@me`,{
        method: 'GET',
        headers: {
            Authorization : `Bearer ${req.params.token}`
        }
    });
    let json = await response.json();
    res.json(json);
})

app.get('/callback', async(req,res)=>{
    if(!req.query.code){
        console.log('fail');
    }else{
        const code = req.query.code;
        const cred = btoa(`${idDiscord}:${secretDiscord}`);
        const response = await fecth(`https://discordapp.com/api/oauth2/token?grant_type=authorization_code&code=${code}&redirect_uri=${redirect}&scope=guilds%20identify%20email`,{
            method: 'POST',
            headers: {
                Authorization : `Basic ${cred}`
            },
        });
        let json = await response.json();
        res.redirect(`/login/${json.access_token}`);

    }
});

app.listen(3000, ()=> {
    console.log('running server');
});