public function show_messages()
 {
     $message = new Message();
     $to_id = $_POST['id'];
     $msg = $message->show_messages($to_id);
     $msg_result = json_decode(json_encode($msg), true);
     foreach ($msg_result as $conversation) {
         if ($conversation['from_id'] != Auth::User()->id) {
             $message->read_msg($conversation['id']);
         }
     }
     return $msg;
 }