Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: YES) in /volume1/web/index.php on line 4

mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: YES) in /volume1/web/index.php on line 4

Call Stack:
    0.0000     455816   1. {main}() /volume1/web/index.php:0
    0.0003     456992   2. mysqli->__construct($hostname = 'localhost', $username = 'root', $password = '[Sensitive Parameter]', $database = 'letssavetheplanet') /volume1/web/index.php:4