fix list registered user does not have registered_status field (#268)

lib/routes/api/accounts.js

@@ -187,13 +187,12 @@ router.post('/:sid/RegisteredSipUsers', async(req, res) => {
         name: u,
         contact:  null,
         expiryTime:  0,
-        protocol: null,
-        registered_status: 'inactive'
+        protocol: null
       };
-      delete user.sbcAddress;
       ret.push({
         name: u,
-        ...user
+        ...user,
+        registered_status: user.expiryTime > 0 ? 'active' : 'inactive',
       });
     }
     res.status(200).json(ret);