How to get google oauth refresh token in the lambda function by configuring the account linking section in alexa developer console?

Question

I have referred this link https://medium.com/coinmonks/link-your-amazon-alexa-skill-with-a-google-api-within-5-minutes-7e488dc43168 and used same configuration as stated.

I am able to get access token in the lambda function var accesstoken =handlerInput.requestEnvelope.context.System.user.accessToken;

How to get refresh token in the handlerinput event by configuring the alexa developer console account linking section?

I have tried enable/disable skill in companion app,Tested with simulator,Removing alexa skill from the google auto access and then allowing access.

LaunchRequestHandler = {
  canHandle(handlerInput) {

    return handlerInput.requestEnvelope.request.type === 'LaunchRequest' || (handlerInput.requestEnvelope.request.type === 'IntentRequest' && handlerInput.requestEnvelope.request.intent.name === 'LaunchRequest');
  },
  async handle(handlerInput) {


    console.log('LAUNCH REQUEST CALLED');
    const speechText = 'Welcome!';
    if (handlerInput.requestEnvelope.context.System.user.accessToken === undefined) {
      console.log('ACCESS TOKEN NOT FOUND IN LAUNCH REQUEST');
      return handlerInput.responseBuilder
        .speak("ACCESS TOKEN NOT FOUND IN LAUNCH REQUEST")
        .reprompt("ACCESS TOKEN NOT FOUND IN LAUNCH REQUEST")
        .withLinkAccountCard()
        .withShouldEndSession(true)
        .getResponse();
    } 



     const fs = require('fs');
    const readline = require('readline');
    const { google } = require('googleapis');


    const SCOPES = ['https://www.googleapis.com/auth/userinfo.email','https://www.googleapis.com/auth/userinfo.profile','https://www.googleapis.com/auth/plus.me','https://www.googleapis.com/auth/tasks.readonly','https://www.googleapis.com/auth/tasks'];

function authorize() {

      return new Promise((resolve) => {
        const client_secret = process.env.client_secret;
        const client_id = process.env.client_id;
        const redirect_uris = ['*******************************', '*******************************', '*******************************'];
        const oAuth2Client = new google.auth.OAuth2(
          client_id, client_secret, redirect_uris[0]);

        console.log('access token found : ' + handlerInput.requestEnvelope.context.System.user.accessToken);

        oAuth2Client.credentials = { "access_token": handlerInput.requestEnvelope.context.System.user.accessToken };

Can you add any details like error problem encountered? How do I ask a good question?, How to create a Minimal, Complete, and Verifiable example Show the community what you have tried. — abielita

Sébastien Stormacq Sébastien Stormacq · Accepted Answer · 2019-01-30T16:01:48

The refresh token is not exposed to the Skill by Alexa, in other words : there is no way for your skill code to get access to the refresh token, this is entirely managed by Alexa. Alexa will use the refresh token behind the scene to ask your Identity Provider (Google in your case) a fresh token when your customer will access your skill and the access token is about to expire.

This is explained in Alexa Account Linking documentation at https://developer.amazon.com/docs/account-linking/account-linking-for-custom-skills.html#choose-auth-type-overview

How to get google oauth refresh token in the lambda function by configuring the account linking section in alexa developer console?

1 Answers