OptionalaccountAuthorized B2 account info used to derive the S3 endpoint.
OptionalapplicationB2 application key secret used for S3 request signing.
OptionalapplicationB2 application key ID used for S3 request signing.
OptionalauthorizedS3 API URL returned by B2 authorization.
OptionalsurfaceOptional user-agent surface label for the constructed client.
Options accepted when constructing a concrete S3 peer client.