diff --git a/docker/nginx/libs/skynet/account.lua b/docker/nginx/libs/skynet/account.lua
index 7f000d6e..34fe15f5 100644
--- a/docker/nginx/libs/skynet/account.lua
+++ b/docker/nginx/libs/skynet/account.lua
@@ -78,7 +78,8 @@ function _M.has_subscription()
 end
 
 function _M.is_auth_required()
-    -- authentication is required if mode is set to "authenticated" or "subscription"
+    -- authentication is required if mode is set to "authenticated" 
+    -- or "subscription" (require active subscription to a premium plan)
     return os.getenv("ACCOUNTS_LIMIT_ACCESS") == "authenticated" or _M.is_subscription_required()
 end