How can use setPresenceVerifier when using validator standalone

[alizamani]

Hi,
I want to use laravel validation standalone in codeigniter3. this is code I used:

<?php
include APPPATH . 'vendor/autoload.php';

use Illuminate\Validation\DatabasePresenceVerifier;
use Illuminate\Validation;
use Illuminate\Translation;
use Illuminate\Filesystem\Filesystem;
use Illuminate\Database\Capsule\Manager as Capsule;
use Illuminate\Database\Eloquent as Eloquent;
use Illuminate\Events\Dispatcher;
use Illuminate\Container\Container;

class ValidatorFactory
{
    private $factory;
    public function __construct()
    {
        $this->factory = new Validation\Factory(
            $this->loadTranslator()
        );
    }
    protected function loadTranslator()
    {
        $filesystem = new Filesystem();
        $loader = new Translation\FileLoader(
            $filesystem,
            dirname(dirname(__FILE__)) . '/language'
        );
        $loader->addNamespace(
            'language',
            dirname(dirname(__FILE__)) . '/language'
        );
        $loader->load('english', 'validation', 'language');
        return new Translation\Translator($loader, 'english');
    }
    public function __call($method, $args)
    {
        return call_user_func_array(
            [$this->factory, $method],
            $args
        );
    } 
}

but in this way, validation rule related to database like exists, unique and ... does not work.
I tested several ways like using Capsule and setPresenceVerifier together but does not work too.
could you help me to enable database for validation?

Thanks