NodeJS login request hangs indefinitely

I am trying to follow a tutorial on how to set up sessions with express, but am having an issue with getting a response. Whenever I POST to ‘/’ I never get a response and I get no error message. I can POST to register just fine. Not sure what the issue is, help would be appreciated.

app.js

if (process.env.NODE_ENV !== 'production') {
  require('dotenv').config();
}

var createError = require('http-errors');
var express = require('express');
var path = require('path');
//var cookieParser = require('cookie-parser');
var logger = require('morgan');
var mongoose = require("mongoose");
const passport = require("passport");
//const dotenv = require('dotenv').config();
//const dotenv2 = require('dotenv')
const flash = require('express-flash');
const session = require("express-session");
const mongoDb = process.env.MONGODB_URL;
const bcrypt = require("bcrypt");

//imports passport function from file
const initializePassport = require('./passport-config');
initializePassport(passport,
  username => users.find(user => user.username === username),
  id => users.find(user => user.id === id)

);

const users =[];
mongoose.connect(mongoDb, { useUnifiedTopology: true, useNewUrlParser: true });
const db = mongoose.connection;
db.on("error", console.error.bind(console, "mongo connection error"));


var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
const { cookie } = require('express-validator');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(logger('dev'));
app.use(express.json());


app.use(express.urlencoded({ extended: false }));
app.use(flash())
app.use(session({
  secret: process.env.SESSION_SECRET,
  resave:false,
  saveUninitialized:false
}))
app.use(passport.initialize())
app.use(passport.session());
//app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));



app.use('/', indexRouter);
app.use('/users', usersRouter);


app.get('/', async(req, res, next) => {
  res.render('login.pug');
});

app.post('/', passport.authenticate('local', {
  successRedirect: '/homepage',
  failureRedirect: '/',
  failureFlash:true
}));

app.post("/register", async(req, res) => {
  console.log("Here");
try {
    const hashedPassword = await bcrypt.hash(req.body.password, 10);
    users.push({
      id: Date.now().toString(),
      username: req.body.username,
      password:hashedPassword,
    })
    res.redirect('/');
  } catch {
  res.redirect("/register");
}
console.log(users);
});

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

passport-config.js

const LocalStrategy = require('passport-local').Strategy
const bcrypt = require('bcrypt');


function initialize(passport, getUserByUsername, getUserById) {
    console.log("testing");
    const authenticateUser = async (username, password, done) => {
        const user = getUserByUsername(username);
        if(user == null) {
            return done(null, false, { message:' No user with that name found' });
        }

        try {
            if (await bcrypt.compare(password, user.password)) {
                return done(null,user);
            } else {
                return done(null,false, { message: 'Incorrect password' });
            }
        }
        catch (e){
            return done(e);
        }
    }

    passport.use(new LocalStrategy({username: 'username'},
    authenticateUser));
    passport.serializeUser((user, done) => {null, user.id});
    passport.deserializeUser((id,done) => {return done(null, getUserById(id))});
}

module.exports = initialize;