Bdtjtk

I am creating a dialogflow api and using MongoDb to retrive data.
I am getting an error while MOngoDB is trying to connect to the server.

 'use strict';



const functions = require('firebase-functions');

const {WebhookClient} = require('dialogflow-fulfillment');

//const {Card, Suggestion} = require('dialogflow-fulfillment');

const mongoose = require('mongoose');



// you can use your mongodb connection url string

let uri = 'mongodb+srv://adynoruser:Adynor@123@cluster0-i0lae.gcp.mongodb.net/test?retryWrites=true';



let Song; 



mongoose.connect(uri,{ useNewUrlParser: true });



let mdb = mongoose.connection;



mdb.on('error', console.error.bind(console, 'connection error:'));



mdb.once('open', function callback() {



  // Create song schema

  let songSchema = mongoose.Schema({

    decade: String,

    artist: String,

    song: String,

    weeksAtOne: Number

  });



  // Store song documents in a collection called "songs"

  // this is important ie defining the model based on above schema

  Song = mongoose.model('songs', songSchema);  



  // Create seed data

  let seventies = new Song({

    decade: '1970s',

    artist: 'Debby Boone',

    song: 'You Light Up My Life',

    weeksAtOne: 10

  });



//use the code below to save the above document in the database!

   seventies.save(function (err) {



            console.log('saved');



     });





 });



process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements



exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {

  const agent = new WebhookClient({ request, response });

  console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));

  console.log('Dialogflow Request body: ' + JSON.stringify(request.body));



  function welcome(agent) {



// I use the code below to find a song from database and ask the user whether he wants to listen to it 

// Use the code below to extract data based on your criteria

    return Song.find({ 'song': 'You Light Up My Life' }, 'song')

      .then((songs) => {



            //songs is araay matching criteria, see log output

            console.log(songs[0].song); 

            agent.add(`Welcome to my agent! Would you like to listen ${songs[0].song}?`);



      })

      .catch((err) => {



           agent.add(`Therz some problem`);



      });



  }



  function fallback(agent) {

    agent.add(`I didn't understand`);

    agent.add(`I'm sorry, can you try again?`);

    }





  // Run the proper function handler based on the matched Dialogflow intent name

  let intentMap = new Map();

  intentMap.set('Default Welcome Intent', welcome); 

  intentMap.set('Default Fallback Intent', fallback);

  // intentMap.set('your intent name here', yourFunctionHandler);

  // intentMap.set('your intent name here', googleAssistantHandler);

  agent.handleRequest(intentMap);

});

The error I am getting is

connection error: { Error: querySrv ESERVFAIL _mongodb._tcp.cluster0-i0lae.gcp.mongodb.net
at errnoException (dns.js:28:10)
at QueryReqWrap.onresolve [as oncomplete] (dns.js:219:19)
code: 'ESERVFAIL',
errno: 'ESERVFAIL',
syscall: 'querySrv',
hostname: '_mongodb._tcp.cluster0-i0lae.gcp.mongodb.net' }

I am completely new to Mongodb. Any help is appreciated.