Update app.py

app.py

@@ -232,6 +232,8 @@ def get_inference_client(model_id):
            bill_to="huggingface"  # Assuming billing through HF for Groq
        )
    elif provider == "huggingface":
+       if not HF_TOKEN:
+           raise ValueError("HF_TOKEN environment variable not set for Hugging Face models.")
        return InferenceClient(
            provider="auto",  # Use HF's auto provider for other HF models
            api_key=HF_TOKEN,