Right now the only service Appery provides for with respect to user collections is to add a user. I have a need e.g. to list all users, and that should be as easily done as with other collections. At the very least, Appery should caution developers up front that its automatic ability is limited, so that developers can decide whether to use a custom collection. Incidentally, I know it can be done by creating your own rest service, but I don't believe that is the best answer.