There are no users as yet so you need to add users, at least one for yourself.
You can use the names of the users' Microsoft Windows accounts as user names in the ITP/MDK Repository, and have the ITP/MDK Repository Client log in automatically. To allow this, also add:
AllowUnifiedLogon=Y
to the [Configuration] section in the servers' itprep.ini file, and restart the server.
If you allow unified logon, the ITP/MDK Repository will not check the users' password. The ITP/MDK Repository only needs to have an account with the same name as the Microsoft Windows' user.
For more information on unified log on refer to the Administrative Manual.