code: protected String getLogString(ProfileRequestContext<?, ?> context) {
      try {
        AuthnRequest authnRequest = this.getAuthnRequest(context);
        return String.format("request-id='%s',sp='%s'", authnRequest.getID(), authnRequest.getIssuer().getValue());
      }
      catch (Exception e) {
        return "";
      }
    }
docs: Returns a string to include in logging statements. The returned log string contains information about the current
  request being processed. The format on the log string is {@code key1='value1',key2='value2', ...}.
  
  @param context
  request context
  @return a string to be used in log entries