Oculus Account Linking

Good afternoon!

We implemented linking between our web app account and Oculus account as described here:

https://developer.oculus.com/documentation/native/ps-account-linking/

This process stopped working after Facebook account requirement. None of the call backs work if a user is logged in to Oculus through Facebook.

Is there either:

1. Different way to get Oculus ID and link it through callbacks, as it is applicable to new sign on (facebook) requirements.

OR

2. To get Facebook Id from Oculus Account in Unity (using this SDK: Import Oculus Integration Package | Oculus Developers). Because our app has oauth authentication through Facebook, we could just link it that way.

Any help will be appreciated.

Thank you