code: public void setAudience(Object objAud) {
          if (objAud instanceof List<?>) {
              mapAll.put(PayloadConstants.AUDIENCE, objAud);
          } else if (objAud instanceof String) {
              List<String> list = new ArrayList<String>();
              list.add((String) objAud);
              mapAll.put(PayloadConstants.AUDIENCE, list);
          } else {//TODO
                  //Tr.error(tc, "OIDC_IDTOKEN_BAD_CLAIM_CLASS", PayloadConstants.AUDIENCE, objAud.toString());
          }
      }
docs: client id