session存储在mysql中，当cookie过期了，怎么删除msyql中的session？

You can store the session content in external stores (Redis, MongoDB or other DBs) by passing options.store with three methods (these need to be async functions):

get(key, maxAge, { rolling }): get session object by key
set(key, sess, maxAge, { rolling, changed }): set session object for key, with a maxAge (in ms)
destroy(key): destroy session for key

这里不能获取失效的key

No source file or test is named. Start by tracing the options.store get, set, and destroy contract alongside cookie maxAge handling; determine how an expired cookie should trigger cleanup, then add a regression test confirming that the corresponding MySQL session is removed.

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