How can I connect to a MySql database, through webhook in Dialogflow?

What happens is that, I'm working with Dialogflow , given that I'm creating a Chatbot for a company, so through webhook, in the Fulfillment options I'm connecting to a Firebase database asi.

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

    // initialise DB connection
    const admin = require('firebase-admin');
    admin.initializeApp({
      credential: admin.credential.applicationDefault(),
      databaseURL: 'https://<Nombre de la base de datos>.firebaseio.com',
    });

    process.env.DEBUG = 'dialogflow:debug';

    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 handleAge(agent) {
        const edad = agent.parameters.edad;
         //agent.add('Muchas gracias...');


        //return admin.database().ref('ageInfo').once("value").then((snapshot) => {
        //  var averageAge = snapshot.child("runningAverage").val();
        //  agent.add('Our recorded average age is ' + averageAge);
        //});

         return admin.database().ref('ageInfo').transaction((ageInfo) => {
          if(ageInfo !== null) {
            let oldAverage = ageInfo.runningAverage;
            let oldTotalCount = ageInfo.totalCount;
            let newAverage = (oldAverage * oldTotalCount + edad) / (oldTotalCount + 1);
            ageInfo.runningAverage = newAverage;
            ageInfo.totalCount+=1;
            //agent.add('Nuestra edad promedio registrada es ' + newAverage);
          }
          return ageInfo;
        }, function(error, isSuccess) {
          console.log('Actualizar el éxito de transacción de edad promedio: ' + isSuccess);
        });


      }

      // Run the proper function handler based on the matched Dialogflow intent name
      let intentMap = new Map();
      intentMap.set('preguntaedad', handleAge);
      agent.handleRequest(intentMap);
    });

My question is if there is any possibility that I can connect to a database, to enter data entered by the user.