title: Dynamic Select List In keycloak register form
body: <p>I have a service with an endpoint that gives me a list of <code>Groups</code> like <code>Group 1</code>, <code>Group 2</code>. What I need to do is that when a user gets to register page of keycloak ( using keycloak for authentication of users ) besides <code>username</code> and <code>password</code> I need to add a select list for <code>Groups</code>. the key value pairs for the select list of <code>Group</code> will come from an enpoint of a service. Is this possible with keycloak. If yes how. thanks. I know how to add a simple custom input feild as mentioned <a href="https://github.com/keycloak/keycloak-documentation/blob/master/server_development/topics/custom-attributes.adoc" rel="nofollow noreferrer">here</a> </p>