Provide the settings via auth client.

[SebastianStehle]

Afaik the settings are not available at the moment via the SupabaseAuthClient, even though there is an endpoint for that:
https://github.com/supabase/gotrue?tab=readme-ov-file#get-settings

It would be great to have this available in the client or at least the option to make any http request using the - at the moment - protected properties like url and header information.