code: def authenticate_keystone_admin(self, keystone_sentry, user, password,
                                      tenant=None, api_version=None,
                                      keystone_ip=None, user_domain_name=None,
                                      project_domain_name=None,
                                      project_name=None):
          
          self.log.debug('Authenticating keystone admin...')
          if not keystone_ip:
              keystone_ip = keystone_sentry.info['public-address']
  
          # To support backward compatibility usage of this function
          if not project_name:
              project_name = tenant
          if api_version == 3 and not user_domain_name:
              user_domain_name = 'admin_domain'
          if api_version == 3 and not project_domain_name:
              project_domain_name = 'admin_domain'
          if api_version == 3 and not project_name:
              project_name = 'admin'
  
          return self.authenticate_keystone(
              keystone_ip, user, password,
              api_version=api_version,
              user_domain_name=user_domain_name,
              project_domain_name=project_domain_name,
              project_name=project_name,
              admin_port=True)
docs: Authenticates admin user with the keystone admin endpoint.