ChatFactory::getPersonalChat

public function getPersonalChat($userId = null): ?ChatFavoriteChat
{
	if (!$userId)
	{
		$userId = $this->getContext()->getUserId();
	}

	$params = [
		'TYPE' => Chat::IM_TYPE_PRIVATE,
		'FROM_USER_ID' => $userId,
		'TO_USER_ID' => $userId,
	];

	return $this->getChat($params);
}