express | node.js | oauth2 not authenticating - node.js

Question

so, im using express, and passport-oauth2 / passport-discord to create a website for my discord bot, but the checkauth function always returns false, and during the auth process, i just get redirected to the main auth route and nothing happens. (i never get redirected to the dashboard)
heres the code: (i tried to include every file relative to the problem):
// strategy file
const DiscordStrategy = require('passport-discord').Strategy;
const passport = require('passport');
const DiscordUser = require('.././models/DiscordUser');
var session = require('express-session')
passport.serializeUser((user, done) =>{
done(null, user.id)
})
passport.deserializeUser(async (id, done) =>{
const user = await DiscordUser.findById(id);
if(user){
done(null, user);
}
})
passport.use(new DiscordStrategy({
clientID: process.env.CLIENT_ID,
clientSecret: process.env.CLIENT_SECRET,
callbackURL: process.env.CLIENT_REDIRECT,
scope: ['identify', 'guilds', 'email', 'bot']
}, async (accessToken, refreshToken, profile, done) => {
try{
const user = await DiscordUser.findOne({ discordId: profile.id});
if(user) {
console.log('a known user entered!')
done(null, user);
}else{
console.log('a new user entered!')
const newUser = await DiscordUser.create({
discordId: profile.id,
username: profile.username,
discriminator: profile.discriminator,
email: profile.email,
guilds: profile.guilds
});
const savedUser = await newUser.save();
done(null, savedUser);
}
}catch(err) {
console.log(err);
done(err, null);
}
}));
//checkauth file
module.exports = async (req, res, next) => {
if(req.isAuthenticated()){
return next();
} else {
return res.redirect("/auth");
}
};
//auth router
const router = require('express').Router();
const passport = require('passport');
router.get('/', passport.authenticate('discord'));
router.get('/redirect', passport.authenticate('discord', {
failureRedirect: '/forbidden',
successRedirect: '/dashboard'
}), (req, res) => {
res.sendStatus(200);
})
module.exports = router;
//dashboard router
const router = require('express').Router();
var session = require('express-session');
const CheckAuth = require('../CheckAuth');
router.get('/', CheckAuth, (req, res) => {
res.sendFile('../views/dashboard/index')
})
module.exports = router;
in the main file i just create a random cookie, define the routes, and use app.use(passport.initialize()) and app.use(passport.session()).
if you need anything else let me know, ty :)

Answer 1

In the documentation they use the callback method instead of successRedirect.
router.get('/redirect', passport.authenticate('discord', {
failureRedirect: '/'
}), function(req, res) {
res.redirect('/secretstuff') // Successful auth
});