Update app.py

app.py

@@ -5,6 +5,7 @@ from huggingface_hub import login
 import torch
 import os
 hf_token = os.getenv("llama")
+assert hf_token is not None, "Token is missing! Make sure 'llama' is set in the environment."
 #login(hf_token)
 # Model and adapter paths
 model_name = "unsloth/llama-3.2-1b-instruct-bnb-4bit"  # Base model