[keycloak-user] Custom Email Validation

[zitrone at gmx-topmail.de]

Hi,

is there a way to do a custom email validation befor changing/creating 
an email via the admin rest api?

I already tried to use an eventlistener to catch the adminevents create 
and update on an usertype, but i think they are fired after changing the 
accountdata. I also did not find a way to canncel the event from inside 
the listener.

Regards