forwarding headers in solidjs

// This is not forwarding the client headers.
export const trpc = createTRPCProxyClient<IAppRouter>({
  links: [
    httpBatchLink({
      url: `${getBaseUrl()}/api/trpc`,
      headers() {
        // how to forward client headers?
        const heads = new Map(); // <-- specifically this part
        return Object.fromEntries(heads);
      },
    }),
  ],
});

export const routeData = () => {
  return createServerData$(async () => {
    const organizations =
      await trpc.organization.getOrganizationsByUser.query();
    return organizations;
  });
};

const Page: VoidComponent = () => {
  const organizations = useRouteData<typeof routeData>();
  return (
    <div>
      Organizations
    </div>
  );
};

export default Page;