request.rs

    let req = ListenRequest {
        database: db.clone(),
        labels: HashMap::new(),
        target_change: Some(TargetChange::AddTarget(Target {
            target_id: 0x52757374,
            once: false,
            target_type: Some(TargetType::Documents(DocumentsTarget {
                documents: vec![users_collection],
            })),
            resume_type: None,
        })),
    };