从用户概要(如果请求是由经过身份验证的用户发出的)。
From the user profile, if the request is made by an authenticated user.
可能的一种情况是所有经过身份验证的用户仅仅被转换成一个单个的系统用户。
It's possible that all authenticated users are simply translated to a single system user.
缺省情况下,消息传递将连接仅限制于授予了总线连接角色的经过身份验证的用户。
Messaging limits connections to only authenticated users granted the bus connect role by default.
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