问题
AWS Cognito User Pools have some pre-defined events to handle user signup, confirmation etc. The full list is here.
However, there is no apparent trigger for deleting a user.
So, is there any way one can trigger a Lambda function when a user is deleted from Cognito User Pool (of course, with arguments like username and/or email address)?
来源：https://stackoverflow.com/questions/50876341/triggering-a-lambda-function-upon-deleting-a-user-on-aws-cognito-user-pool