diff --git a/main.py b/main.py
index 98c65e5..fd2fe72 100644
--- a/main.py
+++ b/main.py
@@ -8,7 +8,9 @@ sdtcloudMqttClient = sdtcloudpubsub.sdtcloudpubsub()
 sdtcloudMqttClient.setClient(f"device-app-{uuid.uuid1()}") # parameter is client ID(string)
 
 # call sdtclouds3
-sdtcloudS3Client = sdtclouds3.sdtclouds3()
+S3Id = "" # your S3 AWS Access Key
+S3Key = "" # your S3 AWS Access Sercet Key
+sdtcloudS3Client = sdtclouds3.sdtclouds3(S3Id, S3Key)