Comment 1 for bug 1614010

The change was brought in because `juju register` seems designed for a new user to connect and configure a client (see help), rather than for a non-unique alias to be created or an existing controller to be updated (bug 1593350).

For that reason--that update steps outside the intention of configuring the client for the new user or "complet[ing] the user registration process"--I see this as invalid. (I'll update status as such for now).