/**
  * Update the specified card in storage.
  *
  * @param  Card  $card
  * @return Response
  */
 public function update(Card $card, CardRequest $request)
 {
     $card->id = $request->get('id');
     $card->user()->associate($request->get('user_id'));
     $card->save();
     return redirect()->route('admin.cards.index');
 }