alevel_project/app/Providers/AuthServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Foundation\Auth\User;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Gate;

use App\Models\Item;
use App\Policies\ItemPolicy;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies = [
//        'App\Model' => 'App\Policies\ModelPolicy',
        Item::class => ItemPolicy::class,
    ];

    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->registerPolicies();

        Gate::define('is-admin', function(User $user){
            return $user->role()->first()->name === 'admin';
        });

        Gate::define('registered', function(User $user){
            return $user->id > 0;
        });

    }
}