I'd like to start a website that provides users with photos editing/storing experience. The initial idea is that the user has his own account where we store the edited photos and some settings. I'm am a WordPress web developer and when I try to consider how to build such a website in WordPress I don't really understand how to provide such a services without having access to user photos. My idea was to create a custom post type and save it with the user as an author. But as an admin of the website, I will have access to all the created/saved photos and I would like to build it in a way that I don't have it. Is it possible?
I've used previously the app to write a diary that saved the data to my Google Drive and if I understand correctly, it never had access to my files.
So my question is: what are the best practices to build such a resource? Is it normal to have access to all of your user photos if you provide such a platform?