Access federated user's attribute from user pool

[codeinaire]

** Which Category is your question related to? **

amazon-cognito-identity-js

** What AWS Services are you utilizing? **

AWS Cognito (user pools only), AWS API Gateway, and AWS Lambda.

** Provide additional details e.g. code snippets **

BACKGROUND

I'm using the above mentioned package to create an auth flow only using user pools. I'm using user pools as a user management system AND a way to federate through third party identity providers. I want to do this b/c a user pool will map a third party provider's details to itself once the user has signed-in through the third party.

I've created a custom sign-in button with help from the suggestions from this issue. I'm successfully able to log in with a third party provider, receive the idToken, and invoke the API Gateway with the idToken. This is great and exactly what I want to do.

ISSUE/SQUESTIONS

1. How am I able to access a federated user's attributes from the user pool in which they have been mapped?

I'm able to get a non-federated user's attributes using the getCurrentUser() method. It looks like this is b/c it retrieves a bunch of useful information from local storage put in there by the authenticateUser() method.

But I haven't been able to figure out how to get a federated user's attributes from the user pool. I signed in with my federated user and tried to use the authenticateUser() method, but I just got a null value. I didn't store the two access keys I got from the federated signin into my local storage.

2. Do I need to store the tokens I got from the federate sign-in into local store and then call getCurrentUser()?

In this issue @powerful23 suggested a way to parse the response from a federated sign in, however, it uses the amazon-cognito-auth-js. It is my understanding that amazon-cognito-identity-js is the library to use for more customised auth flow.

3. Do I have to use the amazon-cognito-auth-js library to achieve this? Or can I used the amazon-cognito-identity-js library?

One last question regarding the functionality of mapping federated user's attributes to the user pool.

4. If I cannot access a federated user's attributes why are they even mapped to the user pool??

Thanks in advanced for any help!

[ajhool]

@haverchuck Piggybacking on this to point out that the amazon-cognito-auth-js package appears to be no longer supported ( amazon-archives/amazon-cognito-auth-js#214 ) by AWS. When people ask questions about that package, they are redirected to the Amplify team, but the Amplify team has left this question unanswered for 2+ months.

Being that Amplify is built on top of that package, what is the path forward?

Auth + user management is arguably the most important part of any app and it is disappointing to see AWS let the main sdk for a core & critical service go for 9+ months without resolving issues -- without announcement.

[haverchuck]

@codeinaire @ajhool Amplify uses amazon-cognito-identity-js for most functionality related to User Pools. If you don't want to use Amplify, you can still use the amazon-cognito-identity-js sdk for most uses cases with some extra leg work.

To get the user data, try starting with something like this:

import React from 'react';
import { CognitoUserPool } from 'amazon-cognito-identity-js';
import awsconfig from './aws-exports';

const userData = async () => {
  let userpool = new CognitoUserPool({
    UserPoolId: awsconfig.aws_user_pools_id,
    ClientId: awsconfig.aws_user_pools_web_client_id
  });
  const user = await userpool.getCurrentUser();
  console.log('user', user)
}

export default function App() {
  return (
    <div className="App">
      <button onClick={() => userData()}>Get my user data!</button>
    </div>
  )
}

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