Worker to User X++

public static UserID Worker2UserId(HcmWorkerRecId _WorkerRecId) // Added by ISYX
{
    DirPersonUser   personUser;
    HcmWorker       worker;
     select User from personUser
         exists join worker
            where worker.Person == personUser.PersonParty
                    && worker.RecId == _WorkerRecId;
   
    return personUser.User;
}