I just feel like I'm doing something wrong, but I can't create the create the App for this plug-in. I'm trying to add it to a Facebook Page. Whenever I click the https://developers.facebook.com/apps link, it just takes me to a page to select the link to my Facebook Page. When I select the Page I want the app to be part of, I'm not seeing the Create an App screen. How do I create the app for a Page?