public function index()
 {
     if (Auth::check()) {
         $leaves = Leave::with('user')->get();
         $role = Role::where('user_id', Auth::user()->id)->first();
         return $this->view('dashboard/leave/index', ['leaves' => $leaves, 'role' => $role]);
     } else {
         return $response->redirect('/login', $code = 302);
     }
 }