Read OpenAI key from env

app.py

@@ -1,5 +1,6 @@
 import gradio as gr
 import chainlit as cl
+import os 
 from langchain_openai import ChatOpenAI
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain.text_splitter import RecursiveCharacterTextSplitter
@@ -10,8 +11,8 @@ from langchain_community.chat_message_histories import ChatMessageHistory
 from langchain.memory import ConversationBufferMemory
 from langchain_core.prompts import PromptTemplate
 
-# Your API key
-open_ai_key = "sk-proj-DQPYy7NQXLkgtJDLzrijT3BlbkFJuPuWnU33xKyKxgLQauKO"
+# Access the OpenAI API key from the environment
+open_ai_key = os.getenv("OPENAI_API_KEY")
 
 llm = ChatOpenAI(api_key=open_ai_key)