Adding Authentication to SOAP web services using Laminas-soap and php

Question

Hello fellow travellers, I am trying to learn how to create SOAP Web services end point in PHP. I have found Laminas-soap with its elegant solution. However when trying to add authentication to it although it works when adding creditials to SoapHeaders it goes through, the problem is even without SoapHeaders credentials it still goes through. Can anybody help me with this problem? Here is my Server Code:

Update: Should I just put authentication on every call to not put state on the server?

    <?php

// api.php

require_once __DIR__ . '/vendor/autoload.php';
require_once '../classes/DBConnection.php';

class Server
{   
    
    private $conn;
     
    /**
     * authenticate
     *
     * @param  string $username
     * @param  string $password
     * @return boolean
     */
    public static function authenticate($username, $password) 
    {
        if($username == "Kaloy" && $password == 'password') return true;
        else throw new SOAPFault("Wrong user/pass combination", 401);
    }   

    public function __construct($conn) 
    {
        $this->conn = $conn;    
    }

    /**
     * Say hello.
     *
     * @param string $firstName
     * @return string $greetings
     */
    public function sayHello($firstName)
    {
        return 'Hello ' . $firstName;
    }
        
    /**
     * get products
     *
     * @param string $category
     * @param string $category2
     * @param string $category3
     * @param string $category4
     * @return Array $products
     */
    public function getProd($category, $category2, $category3, $category4) {
        if ($category == "books") {
            // return join(",", array(
            //     "The WordPress Anthology",
            //     "PHP Master: Write Cutting Edge Code",
            //     "Build Your Own Website the Right Way"));
            return array(
                "The WordPress Anthology",
                "PHP Master: Write Cutting Edge Code",
                "Build Your Own Website the Right Way");
        }
        else {            
            return array("No products listed under that category");
        }
    }
        
    /**
     * getData
     *
     * @param string $id
     * @return Object
     */
    public function getData($id) 
    {
        $result = [];
        if (is_null($id)) return $result;
        $qry = "SELECT * FROM test_table";
        return $this->conn->query($qry)->fetchAll(PDO::FETCH_ASSOC);
    }

}

$serverUrl = "http://localhost/laminas-soap/api.php";
$options = [
    'uri' => $serverUrl,
];
$server = new \Laminas\Soap\Server(null, $options);

if (isset($_GET['wsdl'])) {
    $soapAutoDiscover = new \Laminas\Soap\AutoDiscover(new \Laminas\Soap\Wsdl\ComplexTypeStrategy\ArrayOfTypeSequence());
    $soapAutoDiscover->setBindingStyle(array('style' => 'document'));
    $soapAutoDiscover->setOperationBodyStyle(array('use' => 'literal'));
    $soapAutoDiscover->setClass('Server');
    $soapAutoDiscover->setUri($serverUrl);
    
    header("Content-Type: text/xml");
    echo $soapAutoDiscover->generate()->toXml();
} else {
    $soap = new \Laminas\Soap\Server($serverUrl . '?wsdl');
    $soap->setObject(new \Laminas\Soap\Server\DocumentLiteralWrapper(new Server($conn)));
    $soap->handle();
}