We have to create a private getAllUsers method in the MainModel class (Step 6). But then we have to also declare this method in the Model interface (Step 8). How can that be? The interface methods cannot be private, and a method implemented from an interface cannot have a different access modifier. I've asked about this on Discord as well and have been told you can't do this with access modifiers.
The private modifier on the getAllUsers method is causing a problem