Update apis/chat_api.py

apis/chat_api.py

@@ -221,7 +221,7 @@ class ChatAPIApp:
                   "model": data_response.get('model'),
                   "created_at": data_response.get('created_at'),
                   "response": data_response.get('choices')[-1].get('message').get('content'),
-                  "done": True if data_response.get('choices')[-1].get('finish_reason') != null else False,
+                  "done": True if data_response.get('choices')[-1].get('finish_reason') != None else False,
                 }
                 return data_response
         except HfApiException as e: