This file should contain a single line, which is the name of the user who is currently logged in. If the current logged in user is admin then this file will look like this.
此文件应该包含单个行，即当前登录用户的名称。
The current file may have been changed by another user since you last saved it. In that case, what do you want to do?
当前文件在上次保存后可能被另一个用户更改过。基于这种情况，您希望如何处理？
You can save the current state of the file before the user changes it and then roll back to that at a later point.
你可以在用户改变文件之前保存当前的状态，之后可以进行恢复。
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