socket.io passport session undefinded

I want to use req.user.id inside

io.sockets.on('connection', module.exports = function(socket){}

so I tried to using this line socket.request.client.user

like that on

io.sockets.on('connection', module.exports = function(socket,client,req){
    //con
    connections.push(socket);
    //app.use(session);
    app.use(session({ secret: 'keyboard cat',resave: true, saveUninitialized:true})); // session secret
    app.use(passport.initialize());
    app.use(passport.session()); // persistent login sessions

    console.log('connected: %s socket connected -session',socket.request.client.user ,connections.length);

but i get undefined on console

via dark night