public function send_question(Request $request)
 {
     $this->validate($request, ['email' => 'required|email', 'title' => 'required|exists:auctions,title', 'question' => 'required']);
     if (isset($request->confirm)) {
         Auction::ask($request->all());
         return redirect($lang . '/art');
     }
     return view('auctions.ask_conf')->with('message', $request);
 }