In Google Dialogflow, How to save variable till session end - dialogflow-es

Question

I am not able to save token as a variable till the session end. this token will be used for further APIs.
here is my code
'use strict';
const axios = require('axios');
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');
const {Payload} = require('dialogflow-fulfillment');
var token = "";
function login(agent) {
const email = agent.parameters.email;
const password = agent.parameters.password;
const baseurl = "http://demo:3000/login/buyerlogin";
var data = { email: email, password: password };
return axios
.get(baseurl, { data: { email: email, password: password } })
.then((result) => {
if (result.data.status == 200) {
agent.add("Login Successfully 😊");
agent.add("Select an option to proceed with other queries 👇");
token = result.data.token; //token will be used for further APIs
agent.add(
new Payload(agent.UNSPECIFIED, payloadlog, {
rawPayload: true,
sendAsMessage: true,
})
);
}
})
.catch((error) => {
agent.add("else " + error.message);
});
}
I want to save token till the session end.
Please help me out on this.
Thank You

Answer 1

You can save these values in the parameters of a long-lasting Context that you set and later read in your webhook.
Setting the token value in a parameter in the Context might look something like
agent.context.set('info', 99, {
token: token
});
you can later get that Context and the token value with something like
const infoContext = agent.context.get('info');
const token = infoContext.parameters.token;