Update app.py

app.py

@@ -8,6 +8,9 @@ from langchain.agents import AgentExecutor, create_react_agent
 from langchain_core.prompts import PromptTemplate
 from langchain_community.tools import DuckDuckGoSearchRun
 from langchain_huggingface import HuggingFaceEndpoint, ChatHuggingFace
+from dotenv import load_dotenv
+
+HUGGINGFACE_API_TOKEN = os.environ.get("HF_TOKEN")
 # (Keep Constants as is)
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"