bin/console doesn't authenticate user (properly?)

When I launch Karaf on linux, automatically using the wrapper, then bin/client prevents me from running start/stop commands.

1. bin/client
   Logging in as karaf
   1243 [pool-2-thread-2] WARN org.apache.sshd.client.keyverifier.AcceptAllServerKeyVerifier - Server at /0.0.0.0:8101 presented unverified key:
   __ __ ____
   / ///___ __________ _/ __/
   / ,< / __ `/ __/ __ `/ /
   / /| |/ // / / / // / __/
   // ||_,// _,//

Apache Karaf (3.0.1)

Hit '<tab>' for a list of available commands
and '[cmd] --help' for help on a specific command.
Hit 'system:shutdown' to shutdown Karaf.
Hit '<ctrl-d>' or type 'logout' to disconnect shell from current session.

karaf@root()> restart 157
Error executing command: Insufficient credentials.

The only way I can use bin/client is by creating a new user:
edit: etc/users.properties
add:
myuser = mypass,g:admingroup
g\:admingroup = group,admin,manager,viewer

And logging in with bin/client -u myuser

If this is by design, we need to display "NOT AUTHENTICATED" or something when the client opens, since it looks very much like I'm authenticated as 'karaf'.