<?php
namespace AppHttpControllers;

use IlluminateHttpRequest;
use AppRepositoriesUserRepository as User;
use AppTraitsResponseTrait;

class HomeController extends Controller
{
  use ResponseTrait;

  private $user;

  /**
  * Create a new controller instance.
  *
  * @return void
  */
  public function __construct(User $user)
  {
    $this->user = $user;
    $this->middleware('auth');
  }

  /**
  * Show the application dashboard.
  *
  * @return IlluminateHttpResponse
  */
  public function index()
  {
    //dd($this->user->all()->toArray());
    //You can ignore the self:: part, as it doesn't reach this far.
    self::setData($this->user->all()->toArray());
    return "test";
    return view('home');
  }
}

namespace AppTraits;

trait ResponseTrait {
  public function setData($array) {

  }
}

"psr-4": {
   "App\": "app/"
}