FormVkontakte::register

public function register($formId): RetargetingResponse
{
	if (!isset($formId))
	{
		return (new RetargetingServicesResponseVkontakte())
			->addError(new Error('VK lead ads form register: Empty formId.'))
		;
	}
	if (!isset($this->accountId))
	{
		return (new RetargetingServicesResponseVkontakte())
			->addError(new Error('VK lead ads form register: Empty accountId.'))
		;
	}

	$isRegister = $this->registerForm($formId);
	if (!$isRegister)
	{
		return (new RetargetingServicesResponseVkontakte())
			->addError(new Error('VK lead ads form register: Empty formId.'))
		;
	}

	return new RetargetingServicesResponseVkontakte();
}