private function sendContactsToAutomation($contacts, $websiteId)
    {
        $client = $this->helper->getWebsiteApiClient($websiteId);
        $data = [
            'Contacts' => $contacts,
            'ProgramId' => $this->programId,
            'AddressBooks' => [],
        ];
        //api add contact to automation enrolment
        $result = $client->postProgramsEnrolments($data);

        return $result;
    }