code: def create_ec2_role_tag(self, role, policies=None, max_ttl=None, instance_id=None,
                              disallow_reauthentication=False, allow_instance_migration=False, mount_point='aws-ec2'):
          
          params = {
              'role': role,
              'disallow_reauthentication': disallow_reauthentication,
              'allow_instance_migration': allow_instance_migration
          }
  
          if max_ttl is not None:
              params['max_ttl'] = max_ttl
          if policies is not None:
              params['policies'] = policies
          if instance_id is not None:
              params['instance_id'] = instance_id
          return self._adapter.post('/v1/auth/{0}/role/{1}/tag'.format(mount_point, role), json=params)
docs: POST /auth/<mount_point>/role/<role>/tag
  
          :param role:
          :type role:
          :param policies:
          :type policies:
          :param max_ttl:
          :type max_ttl:
          :param instance_id:
          :type instance_id:
          :param disallow_reauthentication:
          :type disallow_reauthentication:
          :param allow_instance_migration:
          :type allow_instance_migration:
          :param mount_point:
          :type mount_point:
          :return:
          :rtype: