Any idea how can i query and filter matching usernames in swift?
Yes, we have an idea of how to do that!
However, we would need to understand what your objects look like and what is meant by ‘matching user names’ - do you mean duplicates? Or you want to see if a username already exists or something else?
Also, including the code you’ve attempted can really help us to help you as the code we write may not match your use case without some example.