Restrict search results

Is it possible to restrict search results to only posts/pages that the user has access to? I have a whole Members area that I don’t necessarily want the public to know the content of.
Similarly, is it possible to integrate with https://www.ads-software.com/plugins/wp-sitemap-page/, to restrict what is shown in the sitemap?
Many thank

The page I need help with: [log in to see the link]