Obviously, I am a novice at this. I created a password for the root user and added another user "Rick" with a password. I changed the host in the config file from 127.0.0.1 to localhost. I saved the file s mysqli_test.php with the exact text in the example since I am not sure what needs to be changed.
<?php
mysqli_connect ('localhost',
'webuser', 'BroWsIng', 'temp');
?>
Warning: mysqli_connect(): (HY000/1045): Access denied for user 'webuser'@'localhost' (using password: YES) in C:\xampp\htdocs\mysqli_test.php on line 3