Ensure onAuthSuccess is called for signup

[Purus]

Please help me to understand how to ensure that the method onAuthSuccess is called for LitAuth. I understand from the docs that LitAuth is already disposed and so the onAuthSuccess is not called in my case. I follow the typical example available.

My requirement is that when new users complete their signup, I want to add the user information to firestore database. Currently I am not able to do it due to the earlier described issue.

How can I modify the example to accomplish this. Thanks in advance.