code: def parse_region(self):
          
  
          try:
              auth_url = self.job_args['os_auth_url']
              if 'tokens' not in auth_url:
                  if not auth_url.endswith('/'):
                      auth_url = '%s/' % auth_url
                  auth_url = urlparse.urljoin(auth_url, 'tokens')
              return auth_url
          except KeyError:
              raise exceptions.AuthenticationProblem(
                  'You Are required to specify an Auth URL, Region or Plugin'
              )
docs: Pull region/auth url information from context.