Remote backup SFTP/SSH

I cant find where to add the username in the remote backup page, only i can find is IP and Port.

I want to use OVH Object Storage, or Hetzner Storage Box.
and they provide custom username to connect.

Hey, i have the same Problem. Actually it is not possible to use the backup with sftp on hetzner or what elseā€¦

Also Hetzner Storage Box? Anything new on this?