C# 开发 Google Workspace 用户新增 API (使用 OAuth 2.0)

public static async Task<DirectoryService> AuthenticateAsync()
{
    try
    {
        Console.WriteLine("[1] 开始认证流程");
        
        // 1. 检查客户端凭据文件
        string credPath = "client_secret.json";
        Console.WriteLine($"[2] 检查文件: {Path.GetFullPath(credPath)}");
        if (!File.Exists(credPath))
        {
            throw new FileNotFoundException("客户端凭据文件未找到");
        }

        // 2. 加载客户端凭据
        using (var stream = new FileStream(credPath, FileMode.Open, FileAccess.Read))
        {
            Console.WriteLine("[3] 正在加载客户端凭据...");
            var clientSecrets = await GoogleClientSecrets.FromStreamAsync(stream);
            
            // 3. 设置存储路径
            string storePath = Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
                "MyAppAuthStore"
            );
            Console.WriteLine($"[4] 令牌存储路径: {storePath}");

            // 4. 执行授权
            Console.WriteLine("[5] 正在启动OAuth授权...");
            var credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                clientSecrets.Secrets,
                new[] { DirectoryService.Scope.AdminDirectoryUser },
                "user",
                CancellationToken.None,
                new FileDataStore(storePath, fullPath: true));

            Console.WriteLine("[6] OAuth授权完成！"); // 检查是否能执行到这里

            // 5. 创建服务实例
            Console.WriteLine("[7] 正在初始化DirectoryService...");
            return new DirectoryService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = "Google Workspace User Creation",
            });

        }
    }
    catch (Exception ex)
    {
        Console.WriteLine($"[ERROR] 认证失败: {ex}");
        throw;
    }
}

public static User CreateUser(DirectoryService service, string domain, NewUserDetails userDetails)
{
    User newUser = new User()
    {
        PrimaryEmail = $"{userDetails.Username}@{domain}",
        Name = new UserName()
        {
            GivenName = userDetails.FirstName,
            FamilyName = userDetails.LastName,
            FullName = $"{userDetails.FirstName} {userDetails.LastName}"
        },
        Password = userDetails.Password,
        ChangePasswordAtNextLogin = true
    };

    // 可选: 设置组织单位
    if (!string.IsNullOrEmpty(userDetails.OrgUnitPath))
    {
        newUser.OrgUnitPath = userDetails.OrgUnitPath;
    }

    try
    {
        var request = service.Users.Insert(newUser);
        return request.Execute();
    }
    catch (Exception ex)
    {
        Console.WriteLine($"创建用户时出错: {ex.Message}");
        return null;
    }
}