sunnysideup/membersonlypages (packagist): This helps you create a section of Members Only pages, by adding a special usergroups.  This is ideal for setting up an intranet. That is, not just anyone can access the pages.  You have to be either an admin OR a member of the specified group.
Keywords: cms|Users|silverstripe|groups|members|intranet|Silverstripe-CMS