iOS & node.js: how to verify passed access token?

Question

I have an iOS which uses OAuth and OAuth2 providers (Facebook, google, twitter, etc) to validate a user and provide access tokens. Apart from minimal data such as name and email

Answer 1

In production for google you can use:

https://www.npmjs.com/package/google-auth-library

const ticket = client.verifyIdToken({
    idToken: ctx.request.body.idToken,
    audience: process.env.GOOGLE_CLIENTID
})