Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in C:\xampp\htdocs\test\user.in.php:9 Stack trace: #0 C:\xampp\htdocs\test\user.in.php(9): mysqli->__construct('localhost', 'root', Object(SensitiveParameterValue), 'loginsystem') #1 {main} thrown in C:\xampp\htdocs\test\user.in.php on line 9