Update app.py

app.py

@@ -89,7 +89,8 @@ def run(hf_token, service, game, functionality, nlp_command):
             outp = {"status": "OK", "result": json.loads(res)["result"]}
     else:
         try:
-            if service == "games":
+            assert "games" in service_list
+            if service == "games":            
                 print(f"{beijing()} [{user_name}] [{game}] {nlp_command}")
             client = Client(
                 url,