internal string getUserIdBySsn(string ssn)
{
//if (StringUtils.isEmpty(ssn) || !VistaSocSecNum.isValid(ssn))
//{
// throw new ArgumentException("Invalid SSN");
//}
string arg = "$O(^VA(200,\"SSN\",\"" + ssn + "\",0))";
string response = VistaUtils.getVariableValue(cxn, arg);
return VistaUtils.errMsgOrIen(response);
}