Update api_usage.py

api_usage.py

@@ -29,7 +29,7 @@ def get_subscription(key):
         quota = ""
         r = requests.post(queryUrl, headers=headers, json=body_gpt4 if check_gpt4_availability() else body_turbo)
         result = r.json()
-        if (result["error"]):
+        if (r.headers['x-ratelimit-limit-requests']):
             e = result["error"]["code"]
             rpm = "";
             org = "";