Confif for passport.js

const Admin = require("../models/admin");
const bcrypt = require("bcryptjs");
const localStrategy = require("passport-local").Strategy;

module.exports = function (passport) {
    passport.use(
        new localStrategy((username, password, done) => {
            Admin.findOne({ username: username }, (err, user) => {
                if (err) throw err;
                if (!user) return done(null, false);
                bcrypt.compare(password, user.password, (er, result) => {
                    if (er){throw er;}
                    if (result === true) {return done(null, user);}
                    else {return done(null, false);}
                });
            });
        })
    );

    passport.serializeUser((user, cb) => {
        cb(null, user.id);
    });

    passport.deserializeUser((id, cb) => {
        Admin.findOne({ _id: id }, (err, user) => {
            const userInformation = {username: user.username, org_id: user.org_id};
            cb(err, userInformation);
        });
    });
};