Document how to establish sessions manually

[thatmarvin]

Under "Custom Callback" in http://passportjs.org/guide/authenticate.html, the docs mention "… it becomes the application's responsibility to establish a session".

Since passport has already implemented this, it makes sense to just invoke it from the app.

The following code, adopted from in middleware/authenticate.js, seems to do the trick:

req.logIn(user, function (err) {
  if (err) {
    throw err;
  }

  // Session is established; redirect to destination or do something else
});

If this indeed correct, I think it's worthwhile to document it? Otherwise, is there a better way to do this?

[jaredhanson]

That's exactly right. Thanks for the report, I'll be sure to get clarify this in my next pass over the documentation.

[jaredhanson]

I've updated the guide to include this info. Thanks for the report!