diff --git a/app/helper/twofa.py b/app/helper/twofa.py
index 4c24dab1..40d4e39b 100644
--- a/app/helper/twofa.py
+++ b/app/helper/twofa.py
@@ -9,12 +9,12 @@ from app.log import logger
 
 class TwoFactorAuth:
     def __init__(self, code_or_secret: str):
-        if len(code_or_secret) < 16:
-            self.code = code_or_secret
-            self.secret = None
-        else:
+        if code_or_secret and len(code_or_secret) > 16:
             self.code = None
             self.secret = code_or_secret
+        else:
+            self.code = code_or_secret
+            self.secret = None
 
     def __calc(self, secret_key: str) -> str:
         try: