code: def _RunOsLoginNssCache(self):
      
      try:
        return subprocess.call([constants.OSLOGIN_NSS_CACHE_SCRIPT])
      except OSError as e:
        if e.errno == errno.ENOENT:
          return None
        else:
          raise
docs: Run the OS Login NSS cache binary.
  
      Returns:
        int, the return code from the call, or None if the script is not found.