public function createCategories(Request $request)
 {
     if (Auth::user()->email == '*****@*****.**') {
         $validator = Validator::make($request->all(), ['name' => 'required', 'position' => 'required|integer']);
         if ($validator->fails()) {
             return redirect('/admin/categories')->withErrors($validator)->withInput();
         }
         $category = new ProductCategories();
         $category->name = $request->input('name');
         $category->position = $request->input('position');
         $category->save();
         return redirect()->back()->with($request->session()->flash('admin-success', 'Успешно създадохте категория.'));
     }
     return redirect('/');
 }