How do I retrieve the granted scopes provided by Google

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I hate Google’s APIs… there’s so much undocumented and very little P2P support for this. Like it took 9 months for some one to respond to the original question and now 6 months for an actual answer…

Anyways, I did a bit of research and they have this documentation page for using .tokeninfo().

// Before running the sample:
// - Enable the API at:
//   https://console.developers.google.com/apis/api/oauth2.googleapis.com
// - Login into gcloud by running:
//   `$ gcloud auth application-default login`
// - Install the npm module by running:
//   `$ npm install googleapis`

const {google} = require('googleapis');
const oauth2 = google.oauth2('v2');

async function main() {
  const auth = new google.auth.GoogleAuth({
    // Scopes can be specified either as an array or as a single, space-delimited string.
    scopes: [],
  });

  // Acquire an auth client, and bind it to all future calls
  const authClient = await auth.getClient();
  google.options({auth: authClient});

  // Do the magic
  const res = await oauth2.tokeninfo({
    access_token: 'placeholder-value',

    id_token: 'placeholder-value',
  });
  console.log(res.data);

  // Example response
  // {
  //   "audience": "my_audience",
  //   "email": "my_email",
  //   "expires_in": 0,
  //   "issued_to": "my_issued_to",
  //   "scope": "my_scope",
  //   "user_id": "my_user_id",
  //   "verified_email": false
  // }
}

main().catch(e => {
  console.error(e);
  throw e;
});
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