Update app.py

app.py

@@ -21,7 +21,7 @@ logger = logging.getLogger(__name__)
 # === Core Components ===
 class QuestionValidation:
     def __init__(self, hf_token: str):
-        self.client = InferenceClient(provider="hf-inference", api_key=hf_token)
+        self.client = InferenceClient(provider="hf-inference", api_key=HF_TOKEN)
         self.llm2_model = "HuggingFaceH4/zephyr-7b-beta"
         self.embedding_model = SentenceTransformer("sentence-transformers/all-mpnet-base-v2")