If so, you need SAP Universal ID. In a few months, SAP Universal ID will be the only option to login to SAP Community. Without it, you will lose your content and badges. If you have multiple accounts, use the Consolidation Tool to merge your content.
Our requirement is, First page of portal should be for anonymoususers, in that first page, there should be link for authenticated users...If click on that link.. login page should appear.