This operation purchases a provisioned capacity unit for an AWS account.
See https://www.paws-r-sdk.com/docs/glacier_purchase_provisioned_capacity/ for full documentation.
glacier_purchase_provisioned_capacity(accountId)
[required] The AWS account ID of the account that owns the vault. You can either specify an AWS account ID or optionally a single '-' (hyphen), in which case Amazon S3 Glacier uses the AWS account ID associated with the credentials used to sign the request. If you use an account ID, don't include any hyphens ('-') in the ID.