HF_token added

agent.py

@@ -91,6 +91,7 @@ def build_graph(provider: str = "huggingface"):
             llm=HuggingFaceEndpoint(
                 repo_id="Qwen/Qwen1.5-7B-Chat",
                 temperature=0,
+                huggingfacehub_api_token=os.getenv("HF_TOKEN")
             )
         )
     else: