Update agent.py

agent.py

@@ -163,7 +163,7 @@ def build_graph(provider: str = "huggingface"):
         # llm = ChatGroq(model="qwen-qwq-32b", temperature=0) # optional : qwen-qwq-32b gemma2-9b-it
     if provider == "huggingface":
         # TODO: Add huggingface endpoint
-        HUGGINGFACEHUB_API_TOKEN = os.getenv['HUGGINGFACEHUB_API_TOKEN']
+        HUGGINGFACEHUB_API_TOKEN = os.getenv('HUGGINGFACEHUB_API_TOKEN')
         repo_id = "llama-2-7b-chat-hf"
         llm = ChatHuggingFace(
             llm=HuggingFaceEndpoint(