[keycloak-user] Add custom user attributes update password page

[Keycloak Deploy]

Hi,

I need to add custom attributes on update password page set by required
action: UPDATE_PASSWORD but when I edit the login-update-password.ftl file
I get a 500 error because I can't get user attributes on this page.

Is necessary to use SPI to do this, or exist another solution?

Thanks in advance for your help