查找记录的用户ID

Question

当我打印此$userDetails=Auth::user()->get();

时，如何从Auth中找到用户ID，我使用了multiAuth功能

    Illuminate\Auth\GenericUser Object
(
    [attributes:protected] => Array
        (
            [id] => 11
            [username] => pradeep -1
            [password] => $2y$10$Qx5wyQEbI7fdBFFl.H3v2.fsm.GiAZ7x72azO7y0Rda350z5TCrGG
            [email] => pradeep33001@gmail.com
            [phone] => 
            [name] => Pradeep Kumar -1
            [created_at] => 2014-03-24 11:50:58
            [updated_at] => 2014-03-24 11:50:58
        )

)

不，我想知道如何找到身份证。