How to generate a random string of fixed length in Go?

Hello everyone! I just started learning Go and encountered a typical task: I need to generate random strings of a given length, for example, to create unique identifiers, tokens, or passwords. I wrote this code: ```go package main import ( "fmt" "math/rand" ) func main() { fmt.Println(RandString(10)) } func RandString(n int) string { var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") b := make([]rune, n) for i := range b { b[i] = letters[rand.Intn(len(letters))] } return string(b) } ``` The code seems to work, but I noticed strange behavior: every time I run the program, the same string is generated. I googled it and found out that I need to use `rand.Seed()`, but even after adding `rand.Seed`