How to use Backpack Permission Manager and Laravel Policy

[christmex]

Hi guys, I made this discussion because of this conversation #501 (reply in thread)

Maybe some of you have already done this before, I tried to apply the Policy Concept but I ended up facing a problem

    protected function setupListOperation()
    {
        $this->authorize('view'); //cause error, authorize doesn't exist
        CRUD::addColumn([
            'name' => 'user_id',
            'type' => 'select',
            'entity'    => 'user', // the method that defines the relationship in your Model
            'attribute' => 'name', // foreign key attribute that is shown to user
            'model'     => "App\Models\User", // foreign key model
        ]);
        CRUD::column('title');
        CRUD::column('description');

        /**
         * Columns can be defined using the fluent syntax or array syntax:
         * - CRUD::column('price')->type('number');
         * - CRUD::addColumn(['name' => 'price', 'type' => 'number']); 
         */
    }

if I use this to check I got authorize doesn't exist error

$this->authorize('view')

I already added this code, the error is gone but still it doesn't work

use Illuminate\Foundation\Auth\Access\AuthorizesRequests;

here's my Policy Class

<?php

namespace App\Policies;

use App\Models\User;
use App\Models\Post;
use Illuminate\Auth\Access\Response;

class PostPolicy
{
    /**
     * Create a new policy instance.
     */
    public function __construct()
    {
        //
    }

    /**
     * Determine whether the user can view any models.
     */
    public function view(): bool
    {
        if (backpack_user()->can('posts.view')) {
           return true;
        }
    }
}

did I miss something, did I make a mistake with my Policy Concept? because I'm still trying to understand this concept, please help me out. If you need any details, let me know, thanks guys.