<!-- This template is a great use for issues that are feature::additions or technical tasks for larger issues.--> ### 问题 <!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. --> <!-- Consider adding related issues and epics to this issue. You can also reference the Feature Proposal Template (https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20proposal%20-%20detailed.md) for additional details to consider adding to this issue. Additionally, as a data oriented organization, when your feature exits planning breakdown, consider adding the `What does success look like, and how can we measure that?` section. --> 用户使用中发现被临时邀请进群组或项目的用户在过期或者即将过期后用户收不到提示，测试下来也确实如此。因为用户在业务中使用的是临时邀请的用户并未使用`access_token`这样就导致在没有准备的情况下业务发生中断。所以对于临时邀请的用户过期后是否可以发送邮件提示，`access_token`过期是有提示的。（暂且不讨论业务应用为什么使用标准账户而不是用`access_token`）  ### 解决方案 Similar to the current notification email of expiring or expired access token. We can send emails (1) 7 days before the access expires; (2) when the access just expires. 详见 https://gitlab.com/gitlab-org/gitlab/-/issues/12704#note_1349172520