REST API to get PCS task for any user by passing the name or email in query parameter

Summary:

Hi All

I'm looking for REST API using which I can retrieve the list of all the tasks pending for action to be taken by user in Processes (PCS). I have used below REST API but it is retrieving the tasks only for the person whose credentials I'm using to access this REST API. I'm looking for something like, I'll use REST API with admin credentials but I'll send the persons name or email id in request like a query parameter for example and get the list of all tasks pending for user to take action. Below documentation is not having