/**
  * Store a newly created resource in storage.
  *
  * @return Response
  */
 public function store(Request $request)
 {
     $this->validate($request, ['givenname' => 'required', 'surname' => 'required', 'address' => 'required', 'zip' => 'required', 'location' => 'required']);
     Holder::create($request->all());
     alert()->success('', 'Holder successfully added!');
     return redirect('holder');
 }