I have an amazon S3 repository and I want to give read-only access to some users. However, I am encountering the following error:

Save(<lock/31f52c3db1>) failed: client.PutObject: Access Denied.
unable to create lock in backend: client.PutObject: Access Denied.

This is because restic is trying to create a lock to open the repository.

It would be useful if restic could be run with the --no-lock option for the viewer. Since it doesn't modify the repository, having the --no-lock option would be useful for read-only access keys.