Where logging unexpected client errors (hooks.client.ts)

[pepa-linha]

I would need to know where to properly send data - such as the logged in user ID - to Sentry.

The documentation shows this example (below).
But I don't know how I can access the page data ($page.data) or how to pass the data from locals where I have a user ID for example.

import { get } from "svelte/store"
import { page } from "$app/stores"

const pageData = get(page).data

But this only works if the error occurs during navigation. If I load the same page directly (or refresh page for example), pageData will be empty.

import * as Sentry from '@sentry/svelte';
 
Sentry.init({/*...*/})
 
/** @type {import('@sveltejs/kit').[HandleClientError](https://kit.svelte.dev/docs/types#public-types-handleclienterror)} */
export function handleError({ error, event }) {
  const errorId = crypto.randomUUID();
  // example integration with https://sentry.io/
  Sentry.captureException(error, { event, errorId });  // HERE I need USER ID
 
  return {
    message: 'Whoops!',
    errorId
  };
}