Laravel 5.3 Auth::user() available in Controller

laravel docs

In Laravel 5.3, you can't access the session or authenticated user in your controller's constructor because the middleware has not run yet.

As an alternative, you may define a Closure based middleware directly in your controller's constructor. Before using this feature, make sure that your application is running Laravel 5.3.4 or above:

class ProjectController extends Controller
{
    /**
     * All of the current user's projects.
     */
    protected $projects;

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware(function ($request, $next) {
            $this->projects = Auth::user()->projects;

            return $next($request);
        });
    }
}

It` works with ....

/*
     *  The authenticated user.protected
      *
      * @var \App\User|null
     */
    protected $user;


    /*
     * Is the user signed In?
     *
     * @var \App\User|null
     */
    protected $signedIn;




    public function __construct() {

        $this->middleware(function ($request, $next) {

            $this->user = $this->signedIn = Auth::user();

            return $next($request);
        });
    }

This also works, Laravel Documentation

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class ProfileController extends Controller
{
    /**
     * Update the user's profile.
     *
     * @param  Request  $request
     * @return Response
     */
    public function update(Request $request)
    {
        // $request->user() returns an instance of the authenticated user...
    }
}