Generate Token to call Dialogflow V2

I need to call a Dialogflow V2 APIs, but to do this i need to generate a token. I found many codes about how to do this, but doesn't work for me.

I'm doing an API to generate token and then pass the token to another API to call DialogFlow APIs.

Can anyone help me how to generate a token to call Dialogflow V2 APIs?

My API to generate token Code below:

const express = require('express');    const router = express.Router();    const googleAuth = require('google-oauth-jwt');    function generateAccessToken() {          return new Promise((resolve) => {                  googleAuth.authenticate(                          {                                  email: "<myemail>",                                  key: "<myprivatekey>",                                  scopes: "https://www.googleapis.com/auth2/v4/token",                          },                          (err, token) => {                                  resolve(token);                          },                  );          });  }    router.get('/token', async(req, res) => {          try {                  let tok = await generateAccessToken();                    return res.status(200).send({ Token: tok});          } catch(err) {                  return res.status(500).send({ error: 'Erro ao gerar token'});          }  });    module.exports = app => app.use('/', router);  

https://stackoverflow.com/questions/65492711/generate-token-to-call-dialogflow-v2 December 29, 2020 at 09:13PM