ldc-com-app-bo/app/Providers/AuthServiceProvider.php

<?php

namespace App\Providers;

use App\Enums\Roles;
use App\User;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Gate;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies = [];

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

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