[keycloak-user] Validation before account registration

Hello, I'd like to use the keycloak to secure my web application. But I have a requirement to check a number like contract number to validity before registration process. If it's valid the registration is allowed and an account can be created if not nothing should happen. Is it possible to do that with keycloak? I suppose that I can not use the regular registration link in the log-in form right? Regards Andreas --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus