[keycloak-dev] Custom attributes on registration and account management

I wonder if we should improve handling of custom attributes in freemarker templates and their validation. Let's assume that I want to add custom attribute "birthday" and I want to add it to all screens where user can create/edit account. I can see those issues: - Admin will need to edit 3 separate freemarker templates (registration, account management, update profile page) to have this attribute displayed on all those places. - Missing validations. For registration screen, admin can implement his own validator through the Authentication SPI. But for account management and update profile it's currently no way to add custom validations. But for my "birthday" field, I usually want to have same custom validation applied on all 3 places - Built-in validations: Similarly like we have builtin password policies, we can provide some builtin validators for custom fields (mandatory, regex) I wonder if we should add the tab in admin console where people can specify: - Name of custom attribute and the type. Then we have some freemarker helper, which will render those attributes in all 3 places (registration, account mgmt, updateProfile). I believe something similar like Bill did for custom providers in admin console ( kc-provider-config directive) can work here too. - Define the validators applied to each field. Similarly like we have password/OTP policies, we can have "policies" for each custom attribute. We can provide "mandatory" and "regex" policy with possibility for people to add custom field validator implementations if they want. Not sure if this was already discussed before and just not implemented. However I think this will be useful and currently can't think of much reasons why it couldn't work? Marek