My Ontario Account 取代 ONe-Key

My Ontario Account 的登录网址是 https://signin.ontario.ca/，可以用 Sign-in Partner 的方式登录，也就是用银行账户登录。

以前的 ONe-Key 系统不再存在，看这篇 2023 年底的一篇文章 ONe-Key is being replaced by My Ontario Account

安省政府这个页面 Setting up your Ontario Business Registry profile 列出了指南。在第 2 步 Log in to My Ontario Account 里点击 Log in or create a My Ontario Account 会有说明如何将 ONe-Key account 迁移到 My Ontario Account。见下文：

ONe-Key is no longer available for access. If you previously logged into your ServiceOntario Account using ONe-Key, you will need to migrate your account over to My Ontario Account by creating or using an existing My Ontario Account and selecting "yes" when prompted about migration. 

从 My Ontario Account 退出，也是到上面这个页面。