Backup: use custom S3 provider

I try to setup a custom S3 provider (exoscale) for longhorn backups.
Is this supported / possible? I am not sure how I should format the URI.
I tried: s3://mybucket@sos-ch-dk-2.exo.io/ but that fails as it seems to try to construct s3.sos-ch-dk-2.exo.io.amazonaws.com out of it.

Thanks

Yes we support custom S3 provider.

The setup is similar to Minio. See https://github.com/rancher/longhorn/blob/master/docs/backup.md#setup-a-local-testing-backupstore