Update app.py

app.py

@@ -74,7 +74,6 @@ def keygen(eval_key, user_id):
 
     print("Initializing FHEModelClient...")
     # Let's create a user_id
-    global user_id
     user_id = numpy.random.randint(0, 2**32)
     fhe_api = FHEModelClient(f"fhe_model", f".fhe_keys/{user_id}")
     fhe_api.load()