class agente {
    public $servername = "localhost";
    public  $username = "root";
    public  $password = "????";
    public $dbname = "agentes";

    function __construct() {
        $link = mysqli_connect($this->$servername, $this->$username, $this->$password, $this->$dbname);
    }
    public function getUsers() {

            $sql = "SELECT id, nickname, status FROM users";
            $res = mysqli_query($sql,$link);
            $data = mysqli_fetch_array($res);
            echo "Id: " . $row["id"]. " - Nombre: " . $row["nickname"]. " " . $row["status"]. "<br>";

    }
}