let client = Client(.dotCom, token: "…")
client
    .release(forTag: "tag-name", in: Repository(owner: "ReactiveCocoa", name: "ReactiveCocoa"))
    .startWithResult { result in
        switch result {
        case let .success(response, release):
            print("Downloaded release: \(release)")
        case let .failure(error):
            print("An error occured: \(error)")
        }
    }