要在登录页验证，可以使用与输出那一步相同的用户名和密码。
To authenticate from the login page, you can use the same user name and password that you used during the export step.
与经过身份验证的用户相对应的不同登录(通过计算和聚合user_id元素)。
Different logins corresponding to authenticated users (by counting and aggregating the USER_ID elements).
授权不使用用户ID执行，而是通过验证与用户登录上下文信息相关的组成员关系列表来执行。
Authorization is not performed using the user ID, but by verifying the list of group memberships associated with the user's login context information.
当提供者成功地与请求站点完成身份验证通信后，用户就会认为是处于登录状态，并且可以从他的个人URL 处获得额外的信息。
When the provider communicates successful authentication to the requesting site, that user is considered logged in, and additional information may be retrieved from his personal URL.
所以，问题的代表，如何我与谷歌的身份验证时，谁已经在重新创建了一个帐户的用户登录，这样我就不用生成新的令牌每一次。
So the questions stands, how to I authenticate with Google when a user who've already created an account logs in again so that I won't need to generate new tokens every time.
本系统由用户注册与登录模块、功能模块、课件上传与下载功能模块、课件搜索模块、密码验证模块五个模块组成，用户只需要通过浏览器访问就可以实现操作。
The system provides courseware upload and download. The uploading uses upload components. Client side is compiled by VBscript, as suits any browsers which support VBscript, include IE.
本系统由用户注册与登录模块、功能模块、课件上传与下载功能模块、课件搜索模块、密码验证模块五个模块组成，用户只需要通过浏览器访问就可以实现操作。
The system provides courseware upload and download. The uploading uses upload components. Client side is compiled by VBscript, as suits any browsers which support VBscript, include IE.
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