Related questions:
.dup
Create /etc/backup.d/0-credentials.sh with the contents:
/etc/backup.d/0-credentials.sh
export AWS_ACCESS_KEY_ID='<…>' export AWS_SECRET_ACCESS_KEY='<…>'
Remove awsaccesskeyid and awssecretaccesskey from /etc/backup.d/*.dup files.
awsaccesskeyid
awssecretaccesskey
/etc/backup.d/*.dup