Comment 4 for bug 1271341

Quickstart actions:
   - retrieve the username and the admin-secret from the jenv-file (high);
   - make the envs admin-secret field optional.

GUI actions:
   - in the login view, point the user to the jenv file: its path is
     `$JUJU_HOME/environments/{env name}.jenv`, e.g.:
     `~/.juju/environments/local.jenv`.
This can be problematic for two reasons: IIRC
1) we currently have no way to check the juju-core version from the GUI and
2) the API exposes the environment name only to authenticated users.