[keycloak-dev] Support for passing custom attributes from authenticators to login pages

Hello group, are there any plans to support custom attributes to be passed from authenticators to (login-) forms? Concrete use-case is that I want to pass information from a custom OTP authenticator down to the login-totp.ftl template. Would be helpful if it were possible to pass custom attributes to the create*Page(..) methods in org.keycloak.forms.login.LoginFormsProvider. This would really ease customizations. Other alternatives to pass data are: - use some ThreadLocal storage within an Authenticator (set and clear) - but this feels more like a hack - custom page template and population logic in in a custom FreeMarkerLoginFormsProvider (quite involved...) Cheers, Thomas