In your own applications, you might consider clearing the username and password when failure occurs because of authentication and adding an error message to the screen.

在我们自己的应用程序中，可以考虑在发生认证失败的情况时清除用户名和密码，并向屏幕上添加一条错误消息。

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If you enter an incorrect username or password, you should see a login error message, as in Figure 5.

如果您输入不正确的用户名和密码，将看到一条错误消息，如图5所示。

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If the password isn't set correctly, you will receive a 137 error code.

如果没有正确设置密码，那么将收到一个137错误码。

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In June, a programming error temporarily allowed any password to be used to access any account.

WSJ: Hype Hangs Over Dropbox

In June, a programming error at Internet-based storage firm Dropbox Inc. temporarily allowed any password to be used to access any user account on its website, though Dropbox says fewer than 100 accounts were affected.

WSJ: What's a Company's Biggest Security Risk? You.