delete aws backup recovery points, so you can delete the vault
#!/bin/bash
set -e
echo "Enter the name of the vault where all backups should be deleted."
read VAULT_NAME
for ARN in $(aws backup list-recovery-points-by-backup-vault --backup-vault-name "${VAULT_NAME}" --query 'RecoveryPoints[].RecoveryPointArn' --output text); do
echo "deleting ${ARN} ..."
aws backup delete-recovery-point --backup-vault-name "${VAULT_NAME}" --recovery-point-arn "${ARN}"
done