How to use a route for more than one contenttype?

I'm attempting to make a contenttype specific route, like the example in the bolt documentation:

pagebinding:
  path:           /{slug}
  defaults:
      _controller: 'Bolt\Controllers\Frontend::record'
      'contenttypeslug': page
  requirements:
      'contenttypeslug': 'Bolt\Controllers\Routing::getAnyContentTypeRequirement'

But operating on multiple contenttypes ("pages" and "users" specifically).

In other words, I'd like to do something like this:

pagebinding:
  path:           /{slug}
  defaults:
      _controller: 'Bolt\Controllers\Frontend::record'
      'contenttypeslug': page, user
  requirements:
      'contenttypeslug': 'Bolt\Controllers\Routing::getAnyContentTypeRequirement'

^{This particular example doesn't work, giving a 404 error when e.g. domain.tld/page, user/somepage isn't found.}

So that both domain.tld/somepage and domain.tld/username work,
assuming somepage is the slug of a "page" record, and username is the slug of a "user" record.

Is this possible?

Solution

Simple answer: You can't. There can be only one contenttype that has /{slug}.

Say you have a user 'x', and a page 'x'. Somebody goes to 'domain.tld/x', there's no way to know which is which. Just make the users have a logical URL like /user/x.