You'd probably use a custom workflow backed by lambda functions that interact with your api: https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-u

You'd probably use a custom workflow backed by lambda functions that interact with your api: https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-identity-pools-working-with-aws-lambda-triggers.html https://docs.aws.amazon.com/cognito/latest/developerguide/co...