I want to use the Realm file created in Realm Studio in my own application.

I have a question about Realm.
I am currently developing an application using SwiftUI, but what should I do if I use the Realm file created by Realm Studio within the application?

let realm=try!Realm()
let config = Realm.Configuration(fileURL:URL("filetopath")!, readOnly:true)
Realm.Configuration.defaultConfiguration=config

I've been here, but

let data=realm.objects (Hoge.self)
print(data)

It does not show the contents.

I have hardly touched Realm, and I am a beginner at Swift, so I would appreciate it if you could tell me.