您需要一个菜单选项，其中只有一个针对该用户名的选择器。

You need a menu option that has just one selector for the user name.

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保存变更，然后选择一个唯一的用户名(填入了名称后点击' select username '，例如demo)。

You can save changes, and then pick a unique user name (click 'select username' once you've filled it with a name e.g. demo).

youdao

这就是您访问提示用户名和为用户展示一个选择新用户名的地方。

This is where you access the suggested user names and display them for the user to choose a new name.

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