go-tdlib如何使用SearchContacts

import "github.com/tdlib/td"

client := td.NewClient(td.Config{
    APIID:               <YourAPIID>,
    APIHash:             <YourAPIHash>,
    SystemLanguageCode:  "en",
    DeviceModel:         "Desktop",
    SystemVersion:       "Unknown",
    ApplicationVersion:  "1.0",
    UseMessageDatabase:  false,
    UseFileDatabase:     false,
    UseChatInfoDatabase: false,
    UseTestDataCenter:   false,
    DatabaseDirectory:   "/path/to/db/directory",
    FileDirectory:       "/path/to/file/directory",
    IgnoreFileNames:     false,
})

updates := client.GetRawUpdatesChannel(100)

go func() {
    for update := range updates {
        // 处理回调结果
    }
}()

func handleUpdate(update td.Update) {
    switch update := update.(type) {
    case *td.UpdateUser:
        // 处理用户更新
    }

    case *td.UpdateContacts:
        // 处理联系人更新
        for _, user := range update.Users {
            // 处理每个联系人
        }
    }
}

func main() {
    // 处理回调结果的主逻辑
    for update := range updates {
        handleUpdate(update)
    }
}