Update logged in user details in session

User.findById(req.user._id,function(err,doc){
        req.logIn(doc,function(err1){

                if(err1){ console.log("Error : "+err1) }
                              else{
                                    res.render("abc.ejs",{user:req.user});
                                    console.log('Item Removed Successfully!!!');
                              }

                        });
                  });

Here we are re-login the user
User => Mongoose Model

I've been hunting down an answer for this too. Never mentioned in any docs or tutorials!

What seems to work is, after saving your newly updated user, do req.login(user)...

// "user" is the user with newly updated info
user.save(function(err) {
    if (err) return next(err)
    // What's happening in passport's session? Check a specific field...
    console.log("Before relogin: "+req.session.passport.user.changedField)

    req.login(user, function(err) {
        if (err) return next(err)

        console.log("After relogin: "+req.session.passport.user.changedField)
        res.send(200)
    })
})

The clue was here... https://github.com/jaredhanson/passport/issues/208