Started work on updating playlistHandler.js for dedicated/individual userPlaylist and channelPlaylist document collections.

src/utils/sessionUtils.js

@@ -133,6 +133,7 @@ module.exports.authenticateSession = async function(identifier, secret, req, use
         req.session.user = {
             user: userDB.user,
             id: userDB.id,
+            _id: userDB._id,
             rank: userDB.rank
         }