Is it possible to override the 'sub' claim in an id_token? AWS Cognito federation to Auth0

[karthikeayan]

Is it possible to override the 'sub' claim in an id_token?

We are migrating users from another IdP. These users already have a user Id assigned by that IdP. Our applications that use our legacy IdP use the ‘sub’ field in the id_token to uniquely identify the user. However, if we migrate to Auth0, I don’t want my app owners to see a new user Id in the ‘sub’ claim when the user signs-in. To them, this would look like a new user. By default, Auth0 uses the user_id field for the ‘sub’ claim in the id_token. Is is possible to override this mapping wit…

Ran into the exact same issue, is there a possibility now?

I am adding Auth0 as Identity Provider in AWS Cognito.

[dan.woda]

Hi @karthikeayan,

Welcome to the Community!

I think this answer still stands. There is no way to override the claim, unless you change it completely.

Hope this helps,
Dan