As I mentioned and shared link above - this approach is only working for AEM assets /content/<project> but not working for DAM Assets /content/dam/<project> I want an implementation approach for making Assets gated 

I am trying to follow this for building Custom Authentication Handler - My intension is to Gate the assets and redirect to SSO when trying to access a DAM asset link from AEM Sites. I am using AEMaaCS.Adobe CQ/Adobe AEM: How to Create Custom Authentication Handler in CQ (wemblog.com) It's not workin...