add: added cats, admin rights and owner_username display

back/api/users.js

@@ -10,7 +10,7 @@ router.get('/:id', async (req, res) => {
     const users = await getUser(connection, id);
     connection.end();
     if (users[0]) {
-        res.send({id: users[0].id, username: users[0].username});
+        res.send({id: users[0].id, username: users[0].username, admin: users[0].admin});
     } else {
         res.send('No user found');
     }