> For AI agents: the complete documentation index is available at https://types-mediawiki-response.pages.dev/zh/llms.txt, the full documentation bundle is available at https://types-mediawiki-response.pages.dev/zh/llms-full.txt.

# Interface: ApiUserGroupMembership

Defined in: [core/query/users.ts:98](https://github.com/BearBin1215/types-mediawiki-response/blob/d354a9c689faf74c19e13b617a83dcdb7a83726f/src/core/query/users.ts#L98)

A single group membership with grant metadata. `usprop=groupmemberships`
(vs. the plain name list from `usprop=groups`).

## Properties

### expiry?

> `optional` **expiry?**: `string`

Defined in: [core/query/users.ts:103](https://github.com/BearBin1215/types-mediawiki-response/blob/d354a9c689faf74c19e13b617a83dcdb7a83726f/src/core/query/users.ts#L103)

When the membership expires: a timestamp, or `infinity` when permanent.

***

### group?

> `optional` **group?**: `string`

Defined in: [core/query/users.ts:100](https://github.com/BearBin1215/types-mediawiki-response/blob/d354a9c689faf74c19e13b617a83dcdb7a83726f/src/core/query/users.ts#L100)

Group key, e.g. `sysop`.