[grose]

Aha, so it is part of the spec. Thanks for clarifying that. Appreciate the advice on discoverable credentials as well! I was probably leaving out the discoverable creds from the allowlist. Getting the timing down for when to ask for credentials was a bit tricky but I think I see the whole picture now.

I will say though, when it all works out it's a really nice way to log in, and my users are happy about it.