code: private void endRequest(HttpServerExchange exchange) {
          exchange.setStatusCode(StatusCodes.FORBIDDEN);
          
          Server.headers()
              .entrySet()
              .stream()
              .filter(entry -> StringUtils.isNotBlank(entry.getValue()))
              .forEach(entry -> exchange.getResponseHeaders().add(entry.getKey().toHttpString(), entry.getValue()));
          
          exchange.getResponseSender().send(Template.DEFAULT.forbidden());
      }
docs: Ends the current request by sending a HTTP 403 status code and the default forbidden template
  @param exchange The HttpServerExchange