Seed rand

Backend/Util/Strings.go

@@ -2,12 +2,18 @@ package Util
 
 import (
 	"math/rand"
+	"time"
 )
 
 var (
 	letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
 )
 
+func init() {
+	rand.Seed(time.Now().UnixNano())
+}
+
+// RandomString generates a random string
 func RandomString(n int) string {
 	var (
 		b []rune