Update app.py

app.py

@@ -13,7 +13,7 @@ from langchain.retrievers import EnsembleRetriever
 from langchain.retrievers.multi_query import MultiQueryRetriever
 
 # Environment variable for API token
-api_token = os.getenv("FirstToken")
+api_token = os.getenv("API_TOKEN")
 if not api_token:
     raise ValueError("Environment variable 'FirstToken' not set. Please set the Hugging Face API token.")