import (
	"log"
	"github.com/jaevor/go-nanoid"
)

func main() {
	gen, err := nanoid.Canonic()
	if err != nil {
		panic(err)
	}

	id1 := gen()
	log.Printf("ID 1: %s", id1) // eLySUP3NTA48paA9mLK3V

	// Makes sense to use CustomASCII since 0-9 is ASCII.
	decenaryID, err := nanoid.CustomASCII("0123456789", 12)
	if err != nil {
		panic(err)
	}

	id2 := decenaryID()
	log.Printf("ID 2: %s", id2) // 817411560404
}