import (
	"github.com/line/line-bot-sdk-go/linebot"
)

func main() {
	bot, err := linebot.New("<channel secret>", "<channel access token>")
	...
}

	client := &http.Client{}
	bot, err := linebot.New("<channel secret>", "<channel accsss token>", linebot.WithHTTPClient(client))
	...

	events, err := bot.ParseRequest(req)
	if err != nil {
		// Do something when something bad happened.
	}

	for _, event := range events {
		if event.Type == linebot.EventTypeMessage {
			// Do Something...
		}
	}

	userID := event.Source.UserID
	groupID := event.Source.GroupID
	RoomID := event.Source.RoomID

	replyToken := event.ReplyToken

	leftBtn := linebot.NewMessageTemplateAction("left", "left clicked")
	rightBtn := linebot.NewMessageTemplateAction("right", "right clicked")

	template := linebot.NewConfirmTemplate("Hello World", leftBtn, rightBtn)

	message := linebot.NewTemplateMessage("Sorry :(, please update your app.", template)

	var messages []linebot.Message

	// append some message to messages

	_, err := bot.PushMessage(ID, messages...).Do()
	if err != nil {
		// Do something when some bad happened
	}

	var messages []linebot.Message

	// append some message to messages

	_, err := bot.ReplyMessage(replyToken, messages...).Do()
	if err != nil {
		// Do something when some bad happened
	}