Update app.py

app.py

@@ -17,12 +17,12 @@ from langchain_community.embeddings import SentenceTransformerEmbeddings
 import os
 
 # AWS access credentials
-access_key = os.getenv("ACCESS_KEY")
-secret_key = os.getenv("SECRET_KEY")
+access_key = os.getenv("access_key")
+secret_key = os.getenv("secret_key")
 
 # S3 bucket details
-bucket_name = os.getenv("BUCKET_NAME")
-prefix = os.getenv("PREFIX")
+bucket_name = os.getenv("bucket_name")
+prefix = os.getenv("prefix")
 
 HUGGINGFACEHUB_API_TOKEN = os.getenv("HUGGINGFACEHUB_API_TOKEN")