diff --git a/o2app/entrypoints/flask_application.py b/o2app/entrypoints/flask_application.py
index c7e0ef9..d55b50a 100644
--- a/o2app/entrypoints/flask_application.py
+++ b/o2app/entrypoints/flask_application.py
@@ -25,8 +25,10 @@
 from o2common.config.config import get_review_url
 from o2common.helper import o2logging
 
+AUTH_ENABLED = True
+FLASK_API_VERSION = '1.0.0'
+
 # apibase = config.get_o2ims_api_base()
-auth = True
 app = Flask(__name__)
 logger = o2logging.get_logger(__name__)
 
@@ -39,9 +41,7 @@ def _get_k8s_url():
         raise Exception('Get k8s token review url failed')
 
 
-FLASK_API_VERSION = '1.0.0'
-
-if auth:
+if AUTH_ENABLED:
     # perform service account identity&privilege check.
     _get_k8s_url()
     ad = authprov.auth_definer('ad')
diff --git a/o2common/authmw/authprov.py b/o2common/authmw/authprov.py
index c6f5646..11243df 100644
--- a/o2common/authmw/authprov.py
+++ b/o2common/authmw/authprov.py
@@ -24,14 +24,6 @@
 ssl._create_default_https_context = ssl._create_unverified_context
 logger = o2logging.get_logger(__name__)
 
-# read the conf from config file
-auth_prv_conf = get_auth_provider()
-
-try:
-    token_review_url = get_review_url()
-except Exception:
-    raise Exception('Get k8s token review url failed')
-
 
 class K8SAuthenticaException(Exception):
     def __init__(self, value):
@@ -48,6 +40,8 @@ class auth_definer():
     def __init__(self, name):
         super().__init__()
         self.name = name
+        # read the conf from config file
+        auth_prv_conf = get_auth_provider()
         if auth_prv_conf == 'k8s':
             self.obj = k8s_auth_provider('k8s')
         else:
@@ -71,6 +65,10 @@ class k8s_auth_provider(auth_definer):
 
     def __init__(self, name):
         self.name = name
+        try:
+            self.token_review_url = get_review_url()
+        except Exception:
+            raise Exception('Failed to get k8s token review url.')
 
     def tokenissue(self, **args2):
         pass
@@ -105,7 +103,7 @@ def authenticate(self, token):
                   'Content-Type': 'application/json'}
         try:
             req = urllib.request.Request(
-                token_review_url, data=binary_data, headers=header)
+                self.token_review_url, data=binary_data, headers=header)
             response = urllib.request.urlopen(req)
             data = json.load(response)
             if data['status']['authenticated'] is True: