application.php

См. документацию.

<?php
namespace Bitrix\Rest;
 
 
use Bitrix\Main\Event;
 
class Application
{
    protected static $initialized = false;

    protected static $authProvider = null;

    public static function getAuthProvider()
    {
        static::initialize();
 
        if(static::$authProvider === null)
        {
            static::$authProvider = static::getDefaultAuthProvider();
        }
 
        return static::$authProvider;
    }

    public static function setAuthProvider(AuthProviderInterface $authProvider)
    {
        static::$authProvider = $authProvider;
    }

    protected static function getDefaultAuthProvider()
    {
        return OAuth\Provider::instance();
    }
 
    protected static function initialize()
    {
        if(!static::$initialized)
        {
            static::$initialized = true;
 
            $event = new Event('rest', 'onApplicationManagerInitialize');
            $event->send();
        }
    }
}