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.
Can some send me the links to study KMC as I don't have any idea about KMC but have been assigned to work on KMC. Is it different from EP or comes with EP?