Vue SDK: usage example mistakes: 'isSessionLoading' 'isUserLoading' utilities

[camslice]

Usage example:

const { isSessionLoading } = useSession();
const { isUserLoading } = useUser();

Both isSessionLoading and isUserLoading are undefined. Usage example should be updated to:

const { isLoading: isSessionLoading } = useSession();
const { isLoading: isUserLoading } = useUser();

[camslice]

@asafshen looks good 😎