This is the v1 version, had the v2 before.

client/tag.go

@@ -0,0 +1,24 @@
+package client
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+)
+
+func randomString(n int) (string, error) {
+	b := make([]byte, n)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", err
+	}
+
+	return base64.RawURLEncoding.EncodeToString(b), nil
+}
+
+func generateTag() string {
+	tag, err := randomString(4)
+	if err != nil {
+		panic(err)
+	}
+	return tag
+}