Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in C:\xampp\htdocs\test\Vehicle-Management\signup.php:2 Stack trace: #0 C:\xampp\htdocs\test\Vehicle-Management\signup.php(2): mysqli_connect('localhost', 'root', '', 'vehicle managem...') #1 {main} thrown in C:\xampp\htdocs\test\Vehicle-Management\signup.php on line 2