Filter which pages to add to sitemap based on page property

[choutkamartin]

Hi, I looked into the documentation but couldn't find what I'm looking for. This is kinda specific use case.

In Next.js, you can assign properties to pages.

const Servers: Page = () => {}

Servers.layout = LayoutPersonal;
Servers.auth = true;
export default Servers;

You can use these properties to (for example) set property auth to true. This property is then used to check or not to check if user is signed in my application. As in example above.

Is there any possible way, to get this property's value when building the sitemap? And if the property is true don't add that page to sitemap as it's clearly a hidden page?

Thanks