Update app.py

app.py

@@ -5,7 +5,11 @@ from huggingface_hub import InferenceClient
 """
 For more information on `huggingface_hub` Inference API support, please check the docs: https://huggingface.co/docs/huggingface_hub/v0.22.2/en/guides/inference
 """
-client = InferenceClient("google/gemma-2-2b")
+token = os.getenv("HUGGINGFACE_TOKEN")
+if token =="":
+    raise ValueError("HUGGINGFACE_TOKEN environment variable is not set")
+    
+client = InferenceClient("google/gemma-2-2b",token = token)
 
 @spaces.GPU(duration=60)
 def respond(