Capture task accepted user in process model and pass username into database

Execute report will work if we are running standalone in another process. My requirement is, we need to invoke another system via web service (subprocess preferred) to send accepted user real-time, so that target system report will reflect the correct data.

The actual question is how to capture accepted user and create an event or another design to call web service during the task is assigned to the user and not yet completed.

Execute report will work if we are running standalone in another process. My requirement is, we need to invoke another system via web service (subprocess preferred) to send accepted user real-time, so that target system report will reflect the correct data.

The actual question is how to capture accepted user and create an event or another design to call web service during the task is assigned to the user and not yet completed.