How laravel `Auth:user()` or `Auth:id()` works

Question

How laravel Auth:user() or Auth:id() works

Is it resides in session or database.

I searched but not get good article.

Please help to understand. I know I will get many down-votes ;)

Answer 1

Did you read this? Its a good guide to start with

https://laravel.com/docs/5.4/authentication