Demonstrate an AWS Lambda Custom Authorizer mixed in with a complex API Gateway deployment and multi-stage param values being passed in.
This is also for scenarios where you have existing Cognito User Pool that you're trying to attach too.
However you could easily update the params.yml under the specific stage to instead of pulling a hardcoded value, pull in an output from CloudFormation.
You can find an example authorizer.js lambda file for id token authentication under cognito-id-token
You can find an example authorizer.js lambda file for access token authentication under cognito-access-token