Update app.py

app.py

@@ -2,11 +2,13 @@ import torch
 import transformers
 from transformers import AutoTokenizer, pipeline
 import gradio as gr
+import os
 
+token = os.getenv('HF_TOKEN')
 
 model = "meta-llama/Llama-2-7b-chat-hf"
 
-tokenizer = AutoTokenizer.from_pretrained(model, token=$HF_TOKEN)
+tokenizer = AutoTokenizer.from_pretrained(model, token=token)
 
 llama_pipeline = pipeline(
     "text-generation",