public function show($id)
 {
     $message = Message::findOrFail($id);
     $answers = Answer::paginate(10);
     if ($message->to_user_id == \Auth::id() || $message->user_id == \Auth::id()) {
         if ($message->to_user_id == \Auth::id()) {
             Message::where('id', $id)->update(['read' => 1]);
         }
         return view('message.show', compact('message', 'answers'));
     } else {
         return back();
     }
 }