Can I hide my AWS access key in Snapshot

I provide subscription services to clients, and one I would like to add is WordPress website backup, as many (most?) hosting companies limit the backups they do IF they do any at all.

I would like to use Snapshot and backup to my AWS Glacier account, but have one concern...

When setting up Snapshot on a WP site, when I enter my AWS access key it remains visible rather than becoming a series of dots like a password would.

I realize the client would still not have access to my Secret Key on AWS, but it still compromises the security of my AWS account. Is there a way to not have that access key visible in the dashboard after setting up Snapshot on a client's website?