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Amazon Cognito
Developer Guide (Version Last Updated: 07/28/2016)

Specifying User Pool Lambda Trigger Settings

You can use AWS Lambda triggers to customize workflows and the user experience with Amazon Cognito. You can create the following Lambda triggers: Pre sign-up, Pre authentication, Custom message, Post authentication, Post confirmation, Define Auth Challenge, Create Auth Challenge, and Verify Auth Challenge Response. For examples of each Lambda trigger, see Customizing User Pool Workflows by Using AWS Lambda Triggers.

Note

The Custom message AWS Lambda trigger is an advanced way to customize messages for email and SMS. For more information, see Customizing User Pool Workflows by Using AWS Lambda Triggers.