根据认证对象的不同。可分为产品认证、实验认证和体系认证。
Can divide for attestation of product certification, experiment and systematic attestation.
由于认证对象、认证功能、自愿或强制性的不同，班级经营认证会有不同的范围、焦点、严格度。
The scope, focus, and rigorous level of accreditation are different due to the various object, function, and participation mode of accreditation program.
登录认证是不重要的，登录“成功”时我们将User对象放置在会话中以表示该用户已登录。
The login authentication will be trivial, and when "successful", we will put a user object in session indicating that the user is logged in.
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