How long does the session last after login?

[ChrisWi]

I am adapting this for ios/moblie. How long does the session last? In AWS iOS SDK, do I need to use these two functions:

• (AWSTask *)refresh
  and
• (AWSTask *)getIdentityId
  or is this good enough: http://docs.aws.amazon.com/mobile/sdkforios/developerguide/getting-started-lambda.html

[jfaraklit]

The cogntio token is valid for 24 hours and the temp. creds. that you get with STS after successful login is valid for an hour. You can use the cognito token to refresh the temp. creds.