need help solving the problem of installing an e-commerce website at XAMPP

saya mendapatkan code open source dari https://github.com/kirilkirkov/Ecommerce-CodeIgniter-Bootstrap berhubung saya adalah pemula saya mendapatkan masalah dari instalasinya. bantu saya dalam langkah menginstall website ini di XAMPP

I have tried installing Xampp but the code appears like this

Severity: Warning

Message: mysqli::real_connect(): (HY000/1045): Access denied for user 'adnan'@'localhost' (using password: YES)

Filename: mysqli/mysqli_driver.php

Line Number: 201

Backtrace:

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\third_party\MX\Loader.php Line: 109 Function: DB

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\third_party\MX\Loader.php Line: 65 Function: initialize

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\third_party\MX\Base.php Line: 55 Function: __construct

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\third_party\MX\Base.php Line: 60 Function: __construct

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\third_party\MX\Controller.php Line: 4 Function: require

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\third_party\MX\Modules.php Line: 123 Function: include_once

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\application\core\MY_Controller.php Line: 3 Function: spl_autoload_call

File: C:\xampp\htdocs\Ecommerce-CodeIgniter-Bootstrap-master\index.php Line: 292 Function: require_once