What is diffent and how send message by id?

[Kohinor46]

HI
Can anybody help me?
When I send message like than it's work

func main() {
	b, err := tele.NewBot(tele.Settings{
		Token:  token,
		Poller: &tele.LongPoller{Timeout: 10 * time.Second},
	})
	if err != nil {
		return
	}
	//send_to_user(6828712208)
	_,err=b.Send(&tele.User{ID: 6828712208},"HI")
	if err!=nil{
		log.Fatal("Ошибка отправки уведомления: ", err)
	}
}

But if i use funcion it's panic:

func main() {
	b, err := tele.NewBot(tele.Settings{
		Token:  token,
		Poller: &tele.LongPoller{Timeout: 10 * time.Second},
	})
	if err != nil {
		return
	}
	send_to_user(6828712208)
	_,err=b.Send(&tele.User{ID: 6828712208},"HI")
	if err!=nil{
		log.Fatal("Ошибка отправки уведомления: ", err)
	}
}

func send_to_user(id int64){
	_,err:=b.Send(&tele.User{ID: id},"NEN")
	if err!=nil{
		log.Fatal("Ошибка отправки уведомления: ", err)
	}
}

What's the difference between these two methods? And how to send a message correctly if i have id?