create account, create email

util/random.go

@@ -0,0 +1,14 @@
+package util
+
+import (
+	"crypto/rand"
+	"io"
+)
+
+func GenerateRandomKey(length int) []byte {
+	k := make([]byte, length)
+	if _, err := io.ReadFull(rand.Reader, k); err != nil {
+		return nil
+	}
+	return k
+}