modify secret key

app.py

@@ -7,11 +7,11 @@ from langchain.chains.question_answering import load_qa_chain
 import streamlit as st
 from langchain.chains import RetrievalQA
 import os 
-HF_TOKEN = os.environ.get("API_TOKEN")
+# HF_TOKEN = os.environ.get("API_TOKEN")
 query = st.text_input("Ask a question: ")
 @st.cache_resource
 def llm():
-    return HuggingFaceHub(repo_id="google/flan-t5-small", model_kwargs={"temperature":0,"max_length":200}, huggingfacehub_api_token=st.secrets(HF_TOKEN)) # type: ignore
+    return HuggingFaceHub(repo_id="google/flan-t5-small", model_kwargs={"temperature":0,"max_length":200}, huggingfacehub_api_token=st.secrets("API_TOKEN")) # type: ignore
 @st.cache_resource
 def qa(query):
     pdf_folder_path = "./PDFfiles"