How would I allow one user that is logged into their account to access a certain page, but another that is logged in to not be able to access the page the other user can, but can see their own page. Like a my account page on Amazon.com.

You'll need to work this out on your own. I would do this... a) create a login screen and add some users to to your control panel. b) Login protect some screens to you can get an idea of how it works. All users that are logged in will have access to these logged in screens. So far so good. Next, I would create a custom menu for each user. I would do this by creating a Menu screen that was powered by a backend script. A dynamic screen. The data URL for this screen would fetch a script you write on your backend. The data URL would have the users id appended to the URL so you know what user is accessing the menu. Use this userId to output the proper menu items. The Menu Screen is powered by a JSON file when you set the dataURL. This means you'll need to look at the docs or to see how to output the JSON for the menu.