Error: req#logout requires a callback function - level 5 using passport to cookies sessions

[UmitRock]

using this code
app.get('/logout', function(req, res, next) {
req.logout(function(err) {
if (err) {
return next(err);
}
res.redirect('/');
});
});

instead of old code
app.get('/logout', function(req, res,) {
req.logout();
res.redirect('/');
});
});