public function store(Request $request, $lang)
 {
     if ($request->isMethod('POST')) {
         $rules = $this->getRules();
         $this->validate($request, $rules);
     }
     $category = new Category();
     $translation = $category->translateOrNew($lang);
     $translation->fill($request->all());
     $category->save();
     return redirect()->route('admin.post.category.index')->with('messages', ['Category created successfully.']);
 }