I have a site I created with Drupal 8, lets say https://example.com/.
I have “embedded” a static site (a bunch of static pages linked to each other) as a “subsite” of example.com, i.e. accessible as https://example.com/whatever/, by ‘simply’ putting all its files in a subfolder of the D8 site, i.e.
I’d like to limit access to this “subsite” to the users that are registered to my D8 site.
How can I do that?