modify secret key

app.py

@@ -7,14 +7,13 @@ from langchain.chains.question_answering import load_qa_chain
 import streamlit as st
 from langchain.chains import RetrievalQA
 import os 
-from dotenv import load_dotenv
+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=os.getenv("API_TOKEN")) # type: ignore
+    return HuggingFaceHub(repo_id="google/flan-t5-small", model_kwargs={"temperature":0,"max_length":200}, huggingfacehub_api_token=HF_TOKEN) # type: ignore
 @st.cache_resource
 def qa(query):
-    load_dotenv()
     pdf_folder_path = "./PDFfiles"
     loader = PyPDFDirectoryLoader(pdf_folder_path)
     docs = loader.load()