docs: public static AuthenticationResult authenticationResultFromRequest(final HttpServletRequest request)
    {
      final AuthenticationResult authenticationResult = (AuthenticationResult) request.getAttribute(
          AuthConfig.DRUID_AUTHENTICATION_RESULT
      );
  
      if (authenticationResult == null) {
        throw new ISE("Null authentication result");
      }
  
      return authenticationResult;
    }