Express-mysql-session preventing passport deserializeUser from running

It was impossible to replicate the problem, so I prepared a working example. [Github repo.]

Its crafted for Openshift, since I saw the usage of its environment variables (it can be adapted with ease for other use cases).

I did some modifications to the original concept :

1. Replaced the old, deprecated (express) bundled middleware usages.
2. Using a Class instead of the self = this concept
3. Using Github instead of Facebook for the user login...
4. Included some basic functions to include new users to the db
5. Missing some original modules (can be included with ease)

I hope it can be useful as a starting point.

 // .: DB Configuration :.const mysql = require('mysql'); var dbconf = {host:process.env.OPENSHIFT_MYSQL_DB_HOST,port:process.env.OPENSHIFT_MYSQL_DB_PORT,user:process.env.OPENSHIFT_MYSQL_DB_USERNAME,password:process.env.OPENSHIFT_MYSQL_DB_PASSWORD,database:process.env.OPENSHIFT_APP_NAME,socket:process.env.OPENSHIFT_MYSQL_DB_SOCKET}}    const dbconn = mysql.createConnection(dbconf); /*or create a pool*/ dbconn.connect();// .: Express & Other Middleware Modules :.var express = require('express');var path = require('path');var bodyParser = require('body-parser');var methodOverride = require('method-override');var cookieParser = require('cookie-parser');var serveStatic = require('serve-static');// .: Sessions :.var passport = require('passport');var GitHubStrategy = require('passport-github2');var session = require('express-session');var MySQLStore = require('express-mysql-session')(session);var sessionStoreConf = {  connectionLimit:1,checkExpirationInterval:900000,expiration:86400000,  createDatabaseTable:true,schema:{tableName:'LoginRequests',columnNames:{session_id:'loginID',expires:'expires',data:'data'}}};var sessionStore = new MySQLStore(sessionStoreConf,dbconn);// .: Server (class) :.class Server {  constructor(port, ip){    this.app = express();    this.app.use(cookieParser('secret'));    this.app.use(session({      key:'session_cookie_name',      secret:'secret',      cookie:{maxAge:3600000,secure:false},      store: sessionStore,      resave:false,      saveUninitialized:false    }));    this.app.use(passport.initialize());    this.app.use(passport.session());    this.app.use(serveStatic(path.join(__dirname,'public')))    this.app.listen(port,ip,function(){console.log('[i] Application worker started.');});    //require('./routes/site.js'); //~Example (routes/site.js) :      this.app.get("/",function(req,res){res.send("<a href='./auth/github'>Click here to login (GitHub)</a>");})      this.app.get('/auth/github',passport.authenticate('github',{scope:['user:email']}));      this.app.get('/auth/github/callback',passport.authenticate('github',{failureRedirect:'/'}),function(req,res){res.redirect('/success');});      // route for valid logins      this.app.get('/success', function(req, res){         if(req.user){ console.log(req.user);  res.send(req.user); }        else{ res.redirect('/login'); }      });      // route to check the sessionStore table entries in the browser      this.app.get('/sessions',function(req,res){        dbconn.query("SELECT * FROM LoginRequests",function(err,rows){          if(err){console.log(err);}else{            if(rows.length!=0){              res.send(JSON.stringify(rows));              console.log(rows);            }else{res.send("No LoginRequests found");}          }        });      });    //require('./config/passport.js')(passport);  //~Example (config/passport.js) :      passport.use(new GitHubStrategy(        {clientID:"clientID",clientSecret:"clientSecret",callbackURL:"callbackURL"},        function(token, tokenSecret, user, cb){CheckUser('github',user,cb);}      ));    }}const server = new Server(process.env.OPENSHIFT_NODEJS_PORT,process.env.OPENSHIFT_NODEJS_IP);// .: Passport : Serialize & Deserialize User :.passport.serializeUser(function(user, done){ console.log('[passport] serializeUser'); done(null,user.id);});passport.deserializeUser(function(id, done) { console.log('[passport] deserializeUser');  dbconn.query("SELECT * FROM Users WHERE id=?",[id],function(err,rows){  if(err){console.log(err);}else{    if(rows.length!=0){ done(err,rows[0]); }    else{ done(err,null); }  } });});//:Check if user exists:function CheckUser(platform,user,cb){  dbconn.query("SELECT * FROM Users WHERE id=?",[user.id],function(err,rows){  if(err){console.log(err); cb(err,null);}else{    if(rows.length!=0){cb(null,user);}    else{CreateUser(platform,user,cb);}    }  });}  //:Create new user:function CreateUser(platform,user,cb){  switch(platform){    case "github":       var newUserObj  = {id:user.id,platform:platform,email:user.emails[0].value};      dbconn.query("INSERT INTO Users SET ?",newUserObj,function(err){        if(err){console.log(err); cb(err,null);}else{cb(null,user);}      });    break;    default: console.log("[error] (createUser) : platform not implemented :",platform); cb(err,null); break;  }}