Adding openai api key

app.py

@@ -1,7 +1,18 @@
+import os
 import streamlit as st
 import random
 import time
 
+from langchain.chains import RetrievalQA
+from langchain.chat_models import ChatOpenAI
+from langchain.document_loaders import DataFrameLoader
+from langchain.embeddings import OpenAIEmbeddings
+from langchain.vectorstores import Chroma
+
+
+# Get OpenAI setup
+openai_api_key = os.getenv("openapi_token")
+embedding = OpenAIEmbeddings(openai_api_key=openai_api_key)
 
 # Streamed response emulator
 def response_generator():