code: def begin(self):
          
          exec_payload = ExecutionQueryPayload()
          exec_payload.execution_start_time = int(time.time() * 1000)
          self.execution_start_time = exec_payload.execution_start_time
          exec_payload.guid = self.execution_guid
          exec_payload.username = getpass.getuser()
          self.testcase_manager.insert_execution_data(exec_payload)
docs: At the start of the run, we want to record the test
              execution information in the database.