Ocultar barra wordpress para suscritos

//Desactivar barra de wordpress para suscritos

add_action( 'wp_head', function () {
    $current_user = wp_get_current_user();
    if ( ! user_can( $current_user, "subscriber" ) ){// Check user object has not got subscriber role

    }else{
        add_filter( 'show_admin_bar', '__return_false' );
        echo '<style>html.vc_transform{margin-top: 0 !important;}</style>';
    }
});