如果一个用户忘记了他的用户名，你可以通过询问他的电子邮件地址作为参数传递给GetUserNameByEmail方法获得这个用户名并告知用户，但是这并不安全。
If a user forgets his user name, you can remind him by asking for an E-mail address and passing it to GetUserNameByEmail but that's not a secure option.
忘记你的用户名？
你有一个“奔达”账口但是你忘记你的用户名称或密码。
You have an account with Brand ID but you have forgotten your username and or password.
你有一个“奔达”账口但是你忘记你的用户名称或密码。
You have an account with Brand ID but you have forgotten your username and or password.
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