How can I use a custom form for login, instead of the prebuilt catalyst.auth.signIn("your element id here....");

How can I use a custom form for login, instead of the prebuilt catalyst.auth.signIn("your element id here....");

As of now, it is not possible to have a custom Login UI and still use the Catalyst Authentication feature. The ideal implementation of your custom logic can be determined based on your use case/business logic.