Infrequent authentication failed messages

[ProfessorKaos64]

Every so often, we get this running a job via this API stoack:

Traceback (most recent call last):
  File "jenkins-api-util/jenkins-api-util.py", line 590, in <module>
    build_info = server.get_build_info(job_full_name, this_build_number)
  File "/usr/lib/python2.7/site-packages/jenkins/__init__.py", line 482, in get_build_info
    self._build_url(BUILD_INFO, locals())
  File "/usr/lib/python2.7/site-packages/jenkins/__init__.py", line 447, in jenkins_open
    e.code, e.msg)
jenkins.JenkinsException: Error in request. Possibly authentication failed [401]: Invalid password/token for user: some_user
 Completed at 09/28/2018 05:43 AM

Our code:

  # Track build progress
  if build_info['building']:
   logging.info("Job has started, waiting until completion")
   while build_info['building']:
    logging.info("Status: building...")
    time.sleep(5)
    build_info = server.get_build_info(job_full_name, this_build_number)

It is very infrequent and hard to rack down