How to get user attributes (username, email, etc.) using cognito identity id

Question

I have AWS Cognito Identity Pool that is configured with Cognito User Pool as an authentication provider.

Assume I have identity ID of an identity in Cognito Identit

Answer 1

Just struggled with this for a while, and the way I got the user name, using Java API is:

identityManager.login(this, new DefaultSignInResultHandler() {
        @Override
        public void onSuccess(Activity activity, IdentityProvider identityProvider) {
            ...               
            String userName = ((CognitoUserPoolsSignInProvider) identityProvider).getCognitoUserPool().getCurrentUser().getUserId();