var id UUID = uuid.Rand()
fmt.Println(id.Hex())
fmt.Println(id.Raw())
id1, err := uuid.FromStr("1870747d-b26c-4507-9518-1ca62bc66e5d")
id2 := uuid.MustFromStr("1870747db26c450795181ca62bc66e5d")
fmt.Println(id1 == id2) // true