change testoutput format

auth.py

@@ -2,7 +2,7 @@ from jose import JWTError, jwt
 import werkzeug
 import os
 from loguru import logger
-
+import json
 
 JWT_PUB_KEY = ""
 try:
@@ -23,6 +23,5 @@ def decodeToken(token):
 def testToken(user, token_info):
     return {
         "message": f"You are user_id {user} and the provided token has been signed by this issuers. Fine.",
-        "details": JSON.stringify(token_info)
-    }
-
+        "details": json.dumps(token_info)
+    }