Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'payment'@'localhost' (using password: YES) in /var/www/html/payment/config.php:13 Stack trace: #0 /var/www/html/payment/config.php(13): mysqli_connect() #1 /var/www/html/payment/index.php(2): include('...') #2 {main} thrown in /var/www/html/payment/config.php on line 13