code: public String getIdentity() {
      try {
          return BouncyCastleUtil.getIdentity(this.certChain);
      } catch (CertificateException e) {
              logger.debug("Error getting certificate identity.", e);
          return null;
      }
      }
docs: Returns the identity of this credential.
  @see #getIdentityCertificate()
  
  @return The identity cert in Globus format (e.g. /C=US/..). Null,
  if unable to get the identity (an error occurred)