Is there any update on the issue? I still want to reference the user pool using the ARN dynamically.
Something that caught me out on this – Cognito Identity Pools cannot have hyphens in the pool name (unlike user pools and many other named elements).
I was getting a regex error when trying to deploy:
1 validation error detected: Value 'XXXXX; at ‘identityPoolName’ failed to satisfy constraint: Member must satisfy regular expression pattern: [\w ]+ (Service: AmazonCognitoIdentity; Status Code: 400;
Removed the hyphens from the name and it deployed without issue:
Have a look here, may help you, unless you provide a string to
arn, the resource build in serverless assumes you’re trying to reference a lambda function to make the authorization, and can only build that kind of authorizer for you: https://github.com/serverless/serverless/blob/master/lib/plugins/aws/package/compile/events/apiGateway/lib/authorizers.js#L27
I managed to dynamically build an Authorizer reference like this:
Dynamic ARN to Cognito authorizer