Flow description

1. Auth adapter is called

   The auth adapter (API) is called to create a user POST /users. The endpoint will check and build a AdminCreateUserRequest and send this to Cognito SDK

2. AWS Cognito

   Cognito will invoke the custom lambda function for PreSignup trigger. This lambda will raise the event User Signup.

3. AWS Stepfunction

   The stepfunction UserOnboarding will be triggered by the event. This stepfunction handles the signup process.

4. Verification

   If verification is handled by Cognito, the step function will either raise UserCreatedEvent or UserAborted, without any additional handling.

   If user verification is not handled by Cognito. The caller of CreateUser is required to invoke a verification process in order for the events to be raised.