更多内容请点击：usernamecheck——提供热门网站的用户名检查。

Read more: UsernameCheck - Check Username Availability on Popular Sites.

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当用户登录并输入用户名和密码时，会检查这些文件。

These files are checked when a user logs in and enters a username and password.

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最初，表单只是检查用户名和密码，如果正确无误则创建一个 loginToken。

Originally, it simply checked the username and password and created a loginToken if they were correct.

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