How to retrieve the sftp-gateway (by thorn technologies) user to s3 bucket mapping

Question

I'm using sftp-gateway software from Amazon Marketplace. I have added a user using sudo addsftpuser <username> command long back. I have selected a default bucket name for that user. Now, I would like to retrieve the s3 corresponding bucket name for that user.

One way to retrieve it is, add the same user again & it will prompt asking to keep the bucket name same or not. It is a little risky option. Is there a command to retrieve the mapping between user & s3 bucket for sftp-gateway users.