bucketName

Specifies a name for the bucket. The bucket name must contain only lowercase letters, numbers, and hyphens (-). A directory bucket name must be unique in the chosen Availability Zone or Local Zone. The bucket name must also follow the format 'bucket_base_name--zone_id--x-s3'. The zone_id can be the ID of an Availability Zone or a Local Zone. If you don't specify a name, AWS CloudFormation generates a unique physical ID and uses that ID for the bucket name.