Dognation project - not able to register user

[chip1164232840]

Hello everyone,

Looking for some help with the Dognation Password Authentication project.
I’ve got to the end and can’t make my code register a new user… thanks in advance…!

https://www.codecademy.com/paths/full-stack-engineer-career-path/tracks/fscp-22-user-authentication-authorization/modules/wdcp-22-password-authentication/projects/password-authentication-project

app.js:

// Import packages
const express = require("express");
const app = express();
const session = require("express-session");
const passport = require("passport");

// App config
app.set("trust proxy", 1);
const PORT = process.env.PORT || 4001;
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(express.static(__dirname + '/public'));
app.set("view engine", "ejs");
// Import Passport config
require("./config/passport");

// Session Config
app.use(
  session({
    secret:"TSHDJC",
    cookie: { maxAge: 1000 * 60 * 60 * 720 },
    saveUninitialized: false,
    resave: false,
    sameSite: 'none',
    secure: true
  })
);
// Passport Config
app.use(passport.initialize());
app.use(passport.session());
// Routes
app.use(require("./routes/index.routes"));

app.get("/", (req, res) => {
  const user = req.user || "Guest";
  res.render("home", { user });
});


app.listen(PORT, () => {
  console.log(`Server is listening on port: ${PORT}`);
});

users.routes.js:

const express = require("express");
const router = express.Router();
const helper = require("../helpers/helper");
const passport = require("passport");
const filename = "./data/users.json";
const bcrypt = require("bcrypt");
let users = require("../data/users.json");

// Register New User:
router.post("/register", async (req, res) => {
  const { username, password } = req.body;
  const id = { id: helper.getNewId(users) };
  try {
    const user = await helper.userExists(username);
    if (user) {
      console.log("User already exists!");
      return res.redirect("login");
    }
    // Hash password before storing in local DB:
  const salt = await bcrypt.genSalt(10);
  const hash = await bcrypt.hash(password, salt);
    const newUser = { ...id, username, password: hashedPassword };

    // Store new user in local DB
    await users.push(newUser);
    await helper.writeJSONFile(filename, users);

    res.redirect("login");
  } catch (err) {
    res.status(500).json({ message: err.message });
  }
});

// Log In User:
router.post("/login", passport.authenticate ("local", {failureRedirect: '/login'}), (req, res) => {
  res.redirect("../");
});

// Log out user:
router.get("/logout", (req, res) => {
  req.logout();
  res.redirect("../");
});

router.get("/register", (req, res) => {
  res.render("register");
});

router.get("/login", (req, res) => {
  res.render("login");
});

module.exports = router;

passport.js:

const passport = require("passport");
const LocalStrategy = require("passport-local").Strategy;
const bcrypt = require("bcrypt");
const helper = require("../helpers/helper");

// Set up the Passport strategy:
passport.use(
  new LocalStrategy(function (username, password, done) {
    helper.findByUsername(username, async (err, user) => {
      if(err) return done(err);
      if(!user) return done(null, false);
      const matchedPassword = await bcrypt.compare(password, user.password)
      const matchFound = await bcrypt.compare(password, user.password);
      if (!matchedPassword) return done(null, false); 
      return done(null, user);
    })
}))
// Serialize a user
  passport.serializeUser((user, done) => {
    done(null, user.id);
  });
// Deserialize a user
  passport.deserializeUser((id, done) => {
    helper.findById(id, function (err, user) {
      if(err) return done(err);
      done(null, user);
    })
  })