Reading this section of the docs: https://www.revenuecat.com/docs/customers/identifying-customers#supporting-your-customers
Is says
> You can retrieve the currently identified App User ID via the Purchases.shared.appUserID property.
Unfortunately that doesn’t work for me. `Purchases.shared` is `undefined` even after calling `Purchases.configure({ … })`. Are the docs outdated? Or am I doing something wrong?
