Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using passwd) 

Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in C:\xampp\htdocs\dvwa\dvwa\includes\dvwaPage.inc.php:467 Stack trace: #0 C:\xampp\htdocs\dvwa\dvwa\includes\dvwaPage.inc.php(467): mysqli_connect('127.0.0.1', 'root', '') #1 C:\xampp\htdocs\dvwa\vulnerabilities\exec\index.php(14): dvwaDatabaseConnect() #2 {main} thrown in C:\xampp\htdocs\dvwa\dvwa\includes\dvwaPage.inc.php on line 467