[keycloak-user] Keycloak AJAX authentication flow

Hi, I am trying to implement a Keycloak registration theme using the Aurelia JS Framework. The problem is that there is currently no possibility to submit the registration form via AJAX and get back a reduced response that just contains validation errors etc. instead of reloading the whole page. Page reload is problematic in this scenario since it causes a reload of the Aurelia-App which takes too long. As far as I can see, I would need to customize the org.keycloak.authentication.FormAuthenticationFlow but there is not SPI to do so at the moment. Do you have any recommendations for me? Thanks, Moritz