function index()
 {
     $brands = Brand::all();
     $farms = FarmCategory::with('farms')->get();
     $categories = Category::all();
     $user = auth()->user();
     if ($user->role_id == 1) {
         $products = Product::orderBy('id', 'DESC')->paginate(10);
         return view('back.productAdminList', compact('categories', 'products', 'farms', 'brands'));
     } else {
         $products = ProductProvider::where('provider_id', auth()->user()->provider->id)->orderBy('id', 'DESC')->paginate(10);
         return view('back.productProviderList', compact('categories', 'products', 'farms', 'brands'));
     }
 }