For spm-tutorial

LoadGithubUsers

    func loadUsers() {
        Alamofire.request("https://api.github.com/search/users?q=language:swift&sort=followers")
            .validate()
            .responseData { [weak self] (response) in
                switch response.result {
                case .success:
                    guard let data = response.data else {
                        print("empty data received.. handle error")
                        return
                    }
                    do {
                        let jsonDecoder = JSONDecoder()
                        let response = try jsonDecoder.decode(UserQueryResponse.self, from: data)
                        self?.users = response.users
                        self?.tableView.reloadData()
                    } catch {
                        print("handle error \(error)")
                    }
                    
                case .failure(let error):
                    print("handle error \(error)")
                }
        }
    }