sessionMode

Specifies the mode of the session that will be created, either ReadWrite or ReadOnly. If no session mode is specified, the default behavior attempts to create a session with the maximum allowable privilege. It will first attempt to create a ReadWrite session, and if that is not allowed by permissions, it will attempt to create a ReadOnly session. If neither session type is allowed, the request will return an Access Denied error. A ReadWrite session is capable of executing all the Zonal endpoint API operations on a directory bucket. A ReadOnly session is constrained to execute the following Zonal endpoint API operations: GetObject, HeadObject, ListObjectsV2, GetObjectAttributes, ListParts, and ListMultipartUploads.