User::login

static function login()
{
	$eventManager = MainEventManager::getInstance();
	$handler = $eventManager->addEventHandlerCompatible('main', 'OnUserLoginExternal', array('BitrixMailUser', 'onLoginExternal'));

	global $USER;
	$USER->login(null, null, 'Y');

	$eventManager->removeEventHandler('main', 'OnUserLoginExternal', $handler);
}