What does passport.session() middleware do?

Question

I am building an authentication system using Passport.js using Easy Node Authentication: Setup and Local tutorial.

I am confused about what passport.session()<

Answer 1

It simply authenticates the session (which is populated by express.session()). It is equivalent to:

passport.authenticate('session');

as can be seen in the code here:

https://github.com/jaredhanson/passport/blob/42ff63c/lib/authenticator.js#L233