Why is there no connection to the database?

<?php

$servername = "localhost";
$username = "MacBook-Air-Mac.local";
$password = "";
$dbname = "RegisterUser"

$conn = mysqli_connect($servername, $username,$password ,$dbname ,);

if(!$conn){
die("Connection Failed". mysqli_connect_error());
} else {
echo "Успех";
}?<

Code

<?php



$servername = "localhost";

$username = "MacBook-Air-Mac.local";

$password = "";

$dbname = "RegisterUser"



$conn = mysqli_connect($servername, $username,$password ,$dbname ,);



if(!$conn){

    die("Connection Failed". mysqli_connect_error());

} else {

    echo "Успех";

}?<

я не втыкаю что писать в юзернейм как не имя локального хоста. или я не прав?