private TubeMQResult handleInvalidMethod(String method) {
        LOGGER.warn("Invalid method value received: {}", method);
        return TubeMQResult.errorResult("Invalid method value.");
    }
Handles invalid 'method' parameter.

@param method The invalid method value
@return TubeMQResult indicating an error
inlong-tubemq/tubemq-manager/src/main/java/org/apache/inlong/tubemq/manager/controller/topic/TopicWebController.java