title: How laravel `Auth:user()` or `Auth:id()` works
body: <p>How laravel <code>Auth:user()</code> or <code>Auth:id()</code> works</p>
  
  <p>Is it resides in session or database.</p>
  
  <p>I searched but not get good article.</p>
  
  <p>Please help to understand.  I know I will get many down-votes ;)</p>