fix

subscriptions/views.py

@@ -9,7 +9,7 @@ from appstoreserverlibrary.signed_data_verifier import VerificationException, Si
 
 import json, jwt
 import base64
-# import os
+import os
 
 import app_store_notifications_v2_validator as asn2
 from app_store_notifications_v2_validator import InvalidTokenError