I’ve got through most of the challenges for Advanced Node and Express, but I’m stuck on the challenge where you need to set up registration of users. My app allows log in and log out in the preview, but I still can’t pass the criteria for being able to log in for some reason. My registration isn’t working at all. I was getting an error about db.collection not being a function so I moved my app.route(’/register’) into the connection to the database but I just get a 404 error. I’m losing my mind trying to figure out how to pass this. What am I missing? I’ve scoured the forums and tried so many of the suggestions, but no luck. If anyone has suggestions, please try to be as contextual as possible. Just seeing the snippets alone can be difficult on figuring out where exactly they go 
Here’s the Glitch (will expire within five days) https://hammerhead-juice-qckj5li6wtj.glitch.me
Thank you in advance!
My code
server.js
"use strict";
const express = require("express");
const bodyParser = require("body-parser");
const fccTesting = require("./freeCodeCamp/fcctesting.js");
const session = require("express-session");
const passport = require("passport");
const mongo = require("mongodb").MongoClient;
const ObjectID = require("mongodb").ObjectID;
const LocalStrategy = require("passport-local").Strategy;
const app = express();
app.set("view engine", "pug");
fccTesting(app); //For FCC testing purposes
app.use("/public", express.static(process.cwd() + "/public"));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(
session({
secret: process.env.SESSION_SECRET,
resave: true,
saveUninitialized: true
})
);
app.use(passport.initialize());
app.use(passport.session());
mongo.connect(process.env.DATABASE, (err, cluster) => {
if (err) {
console.log("Database error: " + err);
} else {
console.log("Successful database connection");
const db = cluster.db('test');
const coll = db.collection('users');
passport.serializeUser((user, done) => {
done(null, user._id); //get id from mongo
});
passport.deserializeUser((id, done) => {
db.collection("users").findOne({ _id: new ObjectID(id) }, (err, doc) => {
done(null, doc);
});
});
passport.use(
new LocalStrategy(function(username, password, done) {
db.collection("users").findOne({ username: username }, function(
err,
user
) {
console.log("User " + username + " attempted to log in.");
if (err) {
return done(err);
}
if (!user) {
return done(null, false);
}
if (password !== user.password) {
return done(null, false);
}
return done(null, user);
});
})
);
app.route("/register").post(
(req, res, next) => {
db.collection("users").findOne({ username: req.body.username }, function(
err,
user
) {
if (err) {
next(err);
} else if (user) {
res.redirect("/");
} else {
db.collection("users").insertOne(
{ username: req.body.username, password: req.body.password },
(err, doc) => {
if (err) {
res.redirect("/");
} else {
next(null, user);
}
}
);
}
});
},
passport.authenticate("local", { failureRedirect: "/" }),
(req, res, next) => {
res.redirect("/profile");
}
);
app.listen(process.env.PORT || 3000, () => {
console.log("Listening on port " + process.env.PORT);
});
}
});
// Add middleware
function ensureAuthenticated(req, res, next) {
if (req.isAuthenticated()) {
return next(); //move on to rest of function
} else {
res.redirect("/"); //send back to homepage if not authenticated
}
}
app.route("/").get((req, res) => {
res.render(__dirname + "/views/pug/index", {
title: "Home Page",
message: "Login",
showLogin: true,
showRegistration: true
});
});
app
.route("/login")
.post(
passport.authenticate("local", { failureRedirect: "/" }),
(req, res) => {
res.redirect("/profile");
}
);
app.route("/profile").get(ensureAuthenticated, (req, res) => {
res.render(__dirname + "/views/pug/profile", {
title: "Profile",
username: req.user.username
});
});
app.route("/logout").get((req, res) => {
req.logout();
res.redirect("/");
});
app.use((req, res, next) => {
res
.status(404)
.type("text")
.send("Not Found");
});
package.json
{
"//1": "describes your app and its dependencies",
"//2": "https://docs.npmjs.com/files/package.json",
"//3": "updating this file will download and update your packages",
"name": "FCC-Advanced-Node-and-Express",
"author": "http://github.com/JosephLivengood",
"version": "0.0.1",
"description": "What am I about?",
"main": "server.js",
"scripts": {
"start": "node server.js"
},
"dependencies": {
"express": "^4.14.1",
"cors": "^2.8.1",
"body-parser": "^1.16.0",
"mongodb": "^3.5.2",
"helmet": "^3.4.0",
"pug": "^0.1.0",
"passport": "^0.3.2",
"passport-local": "^1.0.0",
"express-session": "^1.15.0"
},
"engines": {
"node": "4.4.3"
},
"repository": {
"type": "git",
"url": "https://hyperdev.com/#!/project/welcome-project"
},
"keywords": [
"node",
"hyperdev",
"express"
],
"license": "MIT"
}
Browser
Chrome 78 on Windows 10
Challenge: Advanced Node and Express - Registration of New Users
Link to the challenge:
https://www.freecodecamp.org/learn/information-security-and-quality-assurance/advanced-node-and-express/registration-of-new-users
