Sometimes it will be desirable to uninstall CLOUD be it for troubleshooting or what have you.
You'll notice that like many programs -- when you re-install it, your profile information / auto-login will be remembered.
To properly delete this information, here is where that information is stored on your local machine
/Users/<username>/Library/Application Support/Lifesize Cloud
Please note that some of these directories may be 'hidden' or 'invisible' to you by default.
If that's the case try typing the directory address manually in the explorer address bar.