How to use the tencentcloud-sdk-nodejs.monitor function in tencentcloud-sdk-nodejs

const tencentcloudcos = require('cos-nodejs-sdk-v5');
const tencentcloud = require('tencentcloud-sdk-nodejs');
const ClientProfile = require('tencentcloud-sdk-nodejs/tencentcloud/common/profile/client_profile.js');
const HttpProfile = require('tencentcloud-sdk-nodejs/tencentcloud/common/profile/http_profile.js');
const assert = require('assert');
const COS = require('cos-nodejs-sdk-v5');

const Credential = tencentcloud.common.Credential;
const ScfClient = tencentcloud.scf.v20180416.Client;
const TagClient = tencentcloud.tag.v20180813.Client;
const MonitorClinet = tencentcloud.monitor.v20180724.Client;

class AbstractHandler {
	constructor(appid, secret_id, secret_key, options) {
		this.appid = appid;
		this.secret_id = secret_id;
		this.secret_key = secret_key;
		this.options = options;

		assert(options, 'options should not is empty');
		this._scfClient = AbstractHandler.createScfClient(secret_id, secret_key, options);
		this._cosClient = AbstractHandler.createCosClient(secret_id, secret_key, options);
		this._tagClient = AbstractHandler.createTagClient(secret_id, secret_key, options);
		this._monitorClient = AbstractHandler.createMonitorClient(secret_id, secret_key, options);
	}

	logger() {

const tencentcloud = require('tencentcloud-sdk-nodejs')
const AbstractHandler = require('../../shared/handler')
const scf_models = tencentcloud.scf.v20180416.Models
const monitor_models = tencentcloud.monitor.v20180724.Models
const util = require('util')

class MetricsFunction extends AbstractHandler {
  async functionList(service, stage) {
    const req = new scf_models.ListFunctionsRequest()
    const body = {
      Namespace: 'default',
      Filters: [
        {
          Name: 'tag-Application',
          Values: [service]
        },
        {
          Name: 'tag-Stage',
          Values: [stage]
        }