OptionalsigningOptionalsigningThe region name to sign the request. It will override the signing region of the signer in current invocation
OptionalsigningThe service signing name. It will override the service name of the signer in current invocation
The date and time to be used as signature metadata. This value should be a Date object, a unix (epoch) timestamp, or a string that can be understood by the JavaScript
Dateconstructor.If not supplied, the value returned bynew Date()will be used.