accesscode.php

См. документацию.

<?php
 
 
namespace Bitrix\Sale\Exchange\Integration\Entity;
 
use Bitrix\Sale\Exchange\Integration\OAuth;
 
class AccessCode
{
    protected $oauthClient;
 
    public function __construct(OAuth\Client $oauthClient)
    {
        $this->oauthClient = $oauthClient;
    }
 
    public function create(array $fields)
    {
        return $this->oauthClient->getAccessToken(
            "refresh_token",
            ["refresh_token" => $fields['refreshToken']]
        );
    }
}