Policies Laravel not sending variable to controller - laravel

Question

I'm new at Laravel, and I'm trying to make Policies that will prevent user that doesn't have id_level 1 which is admin to access InventarisController, but the InventarisPolicy doesn't send variable to InventarisController.
it's my Inventaris Policies
InventarisPolicy.php
<?php
namespace App\Policies;
use App\{User, Level};
use Illuminate\Auth\Access\HandlesAuthorization;
class InventarisPolicy
{
use HandlesAuthorization;
/**
* Create a new policy instance.
*
* #return void
*/
public function __construct()
{
//
}
public function inventaris_add(User $user)
{
$user->id_level == 1;
// dd($user);
// $user->id_level == 2;
}
}
it's my Inventaris Controller
InventarisController.php
<?php
namespace App\Http\Controllers;
use App\{Inventaris, DetailPinjamanView};
// use Illuminate\Http\Controllers\Auth;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Auth;
// use App\Http\Controllers\Auth\Request;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
class InventarisController extends Controller
{
/**
* Create a new controller instance.
*
* #return void
*/
public function __construct()
{
$this->middleware('auth');
}
/**
* Display a listing of the resource.
*
* #return \Illuminate\Http\Response
*/
public function index()
{
// $viewpinjaman = DetailPinjamanView::all();
$this->authorize('inventaris_add', $user);
$inventaris = Inventaris::all();
return view('index', compact('inventaris'));
}