hello, is anybody out there? my previous 3 posts have gone unanswered. i'm hoping that someone can help this time. 
referencing this page: https://helpx.adobe.com/digital-publishing-solution/help/creating-banners.html
under the description for Dynamic Banners, it mentions the ability to have a dynamic banner that "displays the entitlement sign-in prompt," but there is no link to more info. i have looked everywhere for instructions on how to do this. i am sure it's a very simple thing that can be accomplished with a navto:, but i don't know what the navto: should link to. any help would be appreciated!
thanks.