多个user验证该怎么设置[2.0]

    'user' => [
        'identityClass' => 'common\models\User',
        'loginUrl' => '/user/index/index',
    ],
    'usert' => [
        'identityClass' => 'common\models\UserTwo',
        'loginUrl' => '/usert/index/index',
    ],

报了错 The configuration for the “usert” component must contain a “class” element.
这样设置该怎么办？

‘user’ => [
　　　　　’class’ => ‘yii\web\User’，
‘user’ => [
],
‘usert’ => [
　　　　　’class’ => ‘yii\web\User’，
],
啊啊啊，你老婆是不是叫刘瑞啊！