Update Doc Testing (#157)

- [+] test(2fa_test.go): add note about outdated tests
- [+] refactor(middleware.go): combine if statements for setting default JSONMarshal and JSONUnmarshal functions

Author: H0llyW00dzZ

2fa_test.go

@@ -2,6 +2,8 @@
 //
 // License: BSD 3-Clause License
 
+// Note: The tests here are outdated and won't work. It will crash because the focus is still on improving the internal implementation.
+
 package twofa_test
 
 import (

middleware.go

@@ -42,10 +42,8 @@ func New(config ...Config) fiber.Handler {
 	}
 
 	// Set default values for JSONMarshal and JSONUnmarshal if not provided
-	if cfg.JSONMarshal == nil {
+	if cfg.JSONMarshal == nil && cfg.JSONUnmarshal == nil {
 		cfg.JSONMarshal = json.Marshal
-	}
-	if cfg.JSONUnmarshal == nil {
 		cfg.JSONUnmarshal = json.Unmarshal
 	}