Log Out
Passport exposes a logout() function on req (also aliased as logOut())
that can be called from any route handler which needs to terminate a login
session. Invoking logout() will remove the req.user property and clear the
login session (if any).
It is a good idea to use POST or DELETE requests instead of GET requests for the logout endpoints, in order to prevent accidental or malicious logouts.
app.post('/logout', function(req, res, next){
req.logout(function(err) {
if (err) { return next(err); }
res.redirect('/');
});
});