I'm new to this forum, so I'm not sure if this is the correct place or way to ask. Forgive me if it's not. I have an app in the app store that uses the Flickr API and a friend of mine recently pointed me to this blog post about how if I use an API I need an ERN or something like that:https://carouselapps.com/2015/12/09/mac-ios-applications-breaking-rules-removed I asked the freelancer coder that built it for me and he said that he knew nothing about it. I'm confused. Is this true? do I need to get an ERN to publish an app in the iOS store when it's using the Flickr API?