Clojurians Log v2

Beginner question: What is the recommended way to check if an error occurred when using aws-api? Specifically the invoke function. In the Readme it says

Barring client side exceptions, every operation on every AWS service returns a map. If the operation is successful, the map is in the shape described by (-> client aws/ops op :response). 

But i'm not sure how to use that to check for errors in a nice way.