title: Connect app with existing Page
body: <p>I have created a web app that authenticates users on our page and I'd like to connect it with an existing Page, but cannot find that option. I only see "Create Page" in Advanced options, but that's not really what I need.</p>
  
  <p>I figured since it is possible to connect an old app with an existing Page because of the group profiles being removed, it should be possible to connect <em>new</em> apps with existing Pages as well. Am I wrong to assume that, or just blind and did not find that option?</p>