Bootstrap to connect on WP without passwd

adminconnect.php

<?php
/* NE PAS OUBLIER DE SUPPRIMER CE FICHIER */
require_once( 'wp-load.php' );
require_once( './wp-admin/includes/user.php' );

if ( is_multisite() && function_exists('get_super_admins') && $admins = get_super_admins() ) {
	$user = get_user_by( 'login', $admins[0] );
	$user_id = $user->ID;
} else {
	$admins = get_users( array( 'role' => 'administrator' ) );
	$user_id = $admins[0]->ID;
}

$user_data = get_userdata( $user_id );

wp_set_current_user( $user_data->ID, $user_data->user_login );
wp_set_auth_cookie( $user_data->ID );
do_action( 'wp_login', $user_data->user_login, $user_data );
wp_redirect( admin_url( 'index.php' ) );

exit();