How to handle Errors in catch?

export const Route = createFileRoute("/app")({
  beforeLoad: async ({ context: { queryClient }, location }) => {
    try {
      const user = await queryClient.ensureQueryData(currentUserQueryOptions());
      return { user };
    } catch (error) { // error is of type unknown. 
      if (error.status === 401) {
        throw redirect({ to: "/login", search: { redirect: location.href } });
      } else {
        throw error;
      }
    }
  },
  component: App,
});

if (error instanceof Error && "status" in error && error.status === 401) {