YOURLS plugin : automatically login with yourls/yourls (for test installs)

plugin.php

<?php
/*
Plugin Name: login yourls password yourls
Description: Just as the name says
Version: 0.1
Author: Ozh
*/

// No direct call
if( !defined( 'YOURLS_ABSPATH' ) ) die();

yourls_add_action( 'login_form_bottom', 'ozh_login_yourls' );

function ozh_login_yourls( $context ) {
        echo <<<EOD
    <script>
        $('#username').val("yourls");
        $('#password').val("yourls");
        document.write('<span class="error">( ☠ login/password auto fill ☠ )</span>');
    </script>
EOD;
}