下面是一个使用Golang生成阿戈拉安全令牌的示例代码：

package main

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/base64"
	"fmt"
	"time"
)

func generateAgoraToken(appID string, appCertificate string, channelName string, uid uint32, expirationTimeInSeconds uint32) string {
	version := uint32(1)
	currentTimestamp := time.Now().UTC().Unix()
	expirationTimestamp := currentTimestamp + int64(expirationTimeInSeconds)

	// 构建payload字符串
	var payload string
	payload = fmt.Sprintf("%s:%d:%d:%d", appID, expirationTimestamp, uid, version)

	// 使用HMAC-SHA256算法生成signature
	key := []byte(appCertificate)
	h := hmac.New(sha256.New, key)
	h.Write([]byte(payload))
	signature := base64.StdEncoding.EncodeToString(h.Sum(nil))

	// 构建token字符串
	token := fmt.Sprintf("%s:%d:%s:%s", payload, version, signature, appID)

	return token
}

func main() {
	appID := "your_app_id"
	appCertificate := "your_app_certificate"
	channelName := "your_channel_name"
	uid := uint32(123456789)
	expirationTimeInSeconds := uint32(3600)

	token := generateAgoraToken(appID, appCertificate, channelName, uid, expirationTimeInSeconds)
	fmt.Println("Agora Token:", token)
}

请确保将your_app_id和your_app_certificate替换为您自己的应用程序ID和应用程序证书。