I’m running CockroachDB on a DO droplet and want to backup the database to Spaces.

I’ve tried numerous variations on the backup command along the lines of:

backup into 's3://backups?AWS_ACCESS_KEY_ID=xxx&AWS_SECRET_ACCESS_KEY=xxx&AWS_ENDPOINT=fra1.digitaloceanspaces.com';

I’m struggling to find the correct form for the destination string. A working example would be most helpful.