No it's not a trial. But it was working correctly so why would AppD devs ship out a breaking change without notifying us ? We haven't touched the controller in months
As I said, the CURL command from the docs doesn't work. It already has a content-type header: https://docs.appdynamics.com/appd/24.x/24.12/en/extend-cisco-appdynamics/cisco-appdynamics-apis/api-clients#id-.APIClientsv24.10-GeneratetheTokenThroughtheO...