I am currently try to leverage on the container-managed authentication to SSO into pega after logging in from another application. By appending /PRServletContainerAuth to my URL, I am able to directly authenticate the user into dashboard. After some research, I found reference mentioning that this is made possible via EstablishOperator activity. Since I need to trigger some of OOTB API, I am looking at the same authentication logic for REST API as well. However, I couldn't find any authentication service that references the EstablishOperator activity.
Am I looking at the wrong place? I am quite sure that there should be some authentication service to process that since i can perform normal login through PEGA UI.