private function syncTags(Questions $questions, array $tags, $courses_id)
 {
     //dd($questions);
     $questions->tags()->detach();
     foreach ($tags as $tag) {
         $newTags = Tags::firstOrCreate(['name' => $tag, 'courses_id' => $courses_id, 'user_id' => Auth::user()->id]);
         $questions->tags()->attach($newTags);
     }
 }