refactor jwt secret

util/util.go

@@ -4,6 +4,7 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 	"encoding/binary"
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"go-nkode/hashset"
@@ -261,3 +262,12 @@ func GenerateRandomString(length int) string {
 	}
 	return string(b)
 }
+
+func ParseHexString(hexStr string) ([]byte, error) {
+	// Decode the hex string into bytes
+	bytes, err := hex.DecodeString(hexStr)
+	if err != nil {
+		return nil, err
+	}
+	return bytes, nil
+}