code: def kill_running_submission(self, submissionid, user_check=True):
          
          submission = self.get_submission(submissionid, user_check)
          if not submission:
              return False
          if "jobid" not in submission:
              return False
  
          return self._client.kill_job(submission["jobid"])
docs: Attempt to kill the remote job associated with this submission id.
          :param submissionid:
          :param user_check: Check if the current user owns this submission
          :return: True if the job was killed, False if an error occurred