The duration in seconds that the credentials should remain valid.

File: AWS.STS.pas 

Namespace: AWS.STS 

Module: Appercept AWS SDK for Delphi 

Valid range is from 900 seconds (15 minutes) to 129,600 seconds (36 hours). The default is 43,200 (12 hours). Sessions obtained with AWS root account user credentials are restricted to a maximum of 3,600 seconds (1 hour).