code: private void endRequest(HttpServerExchange exchange) {
          exchange.setStatusCode(StatusCodes.UNAUTHORIZED);
          
          Server.headers()
              .entrySet()
              .stream()
              .filter(entry -> StringUtils.isNotBlank(entry.getValue()))
              .forEach(entry -> exchange.getResponseHeaders().add(entry.getKey().toHttpString(), entry.getValue()));
          
          exchange.endExchange();
      }
docs: Ends the current request by sending a HTTP 401 status code and the default unauthorized template
  @param exchange The HttpServerExchange