Update app.py

app.py

@@ -7,7 +7,7 @@ For more information on `huggingface_hub` Inference API support, please check th
 """
 client = InferenceClient(
     model="HuggingFaceH4/zephyr-7b-beta",
-    token=os.getenv('token')
+    token=os.getenv('HF_TOKEN')
 )