public function show(Request $request, $messageGroupID)
 {
     if ($request->wantsJson()) {
         $messageGroup = MessageGroup::findOrFail($messageGroupID);
         $messages = $messageGroup->messages()->with('sender.employee')->get();
         return $messages;
     }
 }
 public function destroy(Request $request, $id)
 {
     $messageGroup = MessageGroup::findOrFail($id);
     if ($messageGroup->isGroupOwner()) {
         $messageGroup->delete();
         return response('Message group deleted!', 200);
     }
     return response('Cannot delete message!', 200);
 }