[keycloak-user] User Name Complexity

[Geadah, Nicolas (VEC)]

There seems to be no "out-of-the-box" support for username complexity requirements; as such, users can register with usernames as short as 1 character, which is problematic and potentially unsafe in a production environment.

What is the best way to enforce a set of username complexity requirements, such as minimum/maximum length - presence of numeric/special characters - etc.

Thank you