WCS manager CLI is available on port 2000, not 22.
Port 22 is the standard SSH port to access Linux server, so you have to use your Linux user credentials on this port.
As for WCS manager CLI, check if WCS is started successfully as described
here, then check if TCP port 2000 is listened by WCS process. If WCS started and listens the port, check if this port available from your PC as described
here.