Signing Up New Users in Parse?

Ben Jakuben, I'm following along the self-destructing messaging app course. I have a question. Im trying to create a new user, with objects that only relate to that user. For instance, if you're creating a new account set the text fields to the username, password, and email. In addition to that, in the back ground i want to create two photo objects for that user that will hold an array of images(PFFiles). Each time you sign in each user should be able to only see photos that correspond to their username. The photos are taken by the user inside the app and i have them saved but when i saved them, i saved them to unique class names using stringWithFormat:@"%@_OldPhotos", [PFUser currentUser].username; I retrieve those objects from parse the same way. But if viewing from parse.com, if i receive a lot of users this will be very troublesome. So i started trying to create relations utilizing the same process as you for adding friends, but I'm having trouble relating these images(PFFiles) to `a user. Any suggestions? Amit Bijlani, Pasan Premaratne P.S I have a great feeling this app will be great. As i've already created a Facebook page for the application. It's pretty complex but I honestly believe I can create it with the proper guidance from you guys. Thanks in advance. Im not looking for answers I'm looking for alternative methods to simplify this problem so my app can be scalable.