Enable the Resource Directory for Members Only

The resource directory can be set so only members can access the resource directory.

The members only Resource Directory can be managed from the right sidebar Master Settings Custom Settings

Under the 'Custom Settings' section set the drop down menu for the 'Resources Access' field to 'Members Only'

NOTE: The URL for both the members only and public Resource Directory will be the same:

http://www.yoursitename.com/resources/