今天中午我日常翻 Outlook 时，收到了来自 Clef CFO 的邮件（应该是群发），由于我英语不是很好，只看懂了一点，但我明白了这一句：
we'll be sunsetting the Clef product with a final shutdown date of 6/6
Clef 将会在今年 6 月 6 日停止服务。
博客添加 Clef 验证也是在去年 12 月，让我没想到的是过了 4 个月我又要换新的了。
既然 6 月 6 日关闭那我就用到那一天吧。
I'm writing to inform you that starting today, we'll be sunsetting the Clef product with a final shutdown date of 6/6 (official blog post here). Everything will remain fully functional and maintained until that date, at which point the mobile apps will cease functioning and be removed from the Google Play and Apple App stores.
As a current Clef user, we recommend that you begin transitioning away from Clef as your preferred login method as soon as possible. We've written a guide to transition from using Clef to another form of two-factor authentication here. We've explored every option to keep the Clef product alive and are deeply sorry for any inconvenience this transition will cause.
If you have any questions or concerns, just reply to this email and we'll get back to you as soon as possible. Thank you for believing in the vision of a passwordless world.
Chief Product Officer