code: public CredentialInfo info(GSSCredential credential,
                                 String username,
                                 String passphrase)
          throws MyProxyException {
          InfoParams request = new InfoParams();
          request.setUserName(username);
          request.setPassphrase(passphrase);
          return info(credential, request)[0];
      }
docs: Retrieves credential information from MyProxy server.
  Only the information of the default credential is returned
  by this operation.
  
  @param  credential
  The local GSI credentials to use for authentication.
  @param  username
  The username of the credentials to remove.
  @param  passphrase
  The passphrase of the credentials to remove.
  @exception MyProxyException
  If an error occurred during the operation.
  @return The credential information of the default
  credential.