The user's browser (the "User Agent") will be redirected to the OP so that the user can provide his or her password and be authenticated.

用户的浏览器（“用户代理”）将被重定向到 OP，这样用户便可以提供其密码并得到身份验证。

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When an OP is asked to authenticate a Claimed Identifier, the user's browser is directed to a sign-in page where the user is challenged to enter his password.

当要求OP验证声明的标识符时，用户的浏览器直接转到登录页面，用户在该页面输入其密码。

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