Update app.py

app.py

@@ -9,7 +9,7 @@ def respond(message, history):
     if len(message.strip()) == 0:
         return "ERROR the question should not be empty"
 
-    local_token = os.getenv('API_TOKEN')
+    local_token = os.getenv('API_KEY')
     local_endpoint = os.getenv('API_ENDPOINT')
 
     if local_token is None or local_endpoint is None: