i couldn't find a solution in the keycloak docu or with the search function. I have a keycloak server with imported useres from ldap. unfortunately they don't have a value for the email field. Now i try to generate a custom user attribute where i concatenate the imported first and lastname to generate the users email address
like:
Attribute: mail-address
Value: {firstname}.{lastname}@xyz.de
Is there any special syntax in Keycloak to do that or do I have to use the admin-api (REST API)?