html - Issues with PHP and World Database: Error

So I'm creating some PHP connected to the World database (https://dev.mysql.com/doc/index-other.html). I'm getting an error that says: Warning: mysqli::__construct(): (HY000/1045): Access denied for user ''@'localhost' (using password: NO) in C:\xampp\htdocs\assignment11\exercise2.php on line 12 Connection failed: Access denied for user ''@'localhost' (using password: NO)
This is for an assignment that said to:
Write a PHP script that uses the world database and shows all the countries stored in the country table and shows all the songs that include the string "island" in the Name field
I don't have any password set so I'm just a little confused. I'm using Visual Studio Code and Xampp (I have Apache and MySQL turned on in the Xampp Control Panel, I have tried to refresh the tab multiple times having just one module or the other on, still no luck). Any assistance would be great, thank you!
Here's the code:
<!DOCTYPE html>
<html>
<body>
<?php
$servername = "";
$username = "";
$password = "";
$dbname = "world";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM country";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "<br>". $row["Name"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<?php
$servername = "";
$username = "";
$password = "";
$dbname = "world";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM songs WHERE Name LIKE '%island%';";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "<br>". $row["Name"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?>
</body>
</html>
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