private void btnlogin_Click(object sender, EventArgs e)
{
    if (String.IsNullOrEmpty(txtusername.Text))
    {
        MessageBox.Show("Please insert username");
    }

    if (String.IsNullOrEmpty(txtpassword.Text))
    {
        MessageBox.Show("Please insert password");
    }

    var username = txtusername.Text;
    var password = txtpassword.Text;
    string Token = "28956";
    var SoftwareToken = token;
    WebRequest request = WebRequest.Create("https://mydomain.com.au/Verification.php?username=username&password=password&Token=SoftwareToken");
    request.Method = "GET";
    WebResponse response = request.GetResponse();
    Console.WriteLine(((HttpWebResponse)response).StatusDescription);
    Stream dataStream = response.GetResponseStream();
    // Open the stream using a StreamReader for easy access.
    StreamReader reader = new StreamReader(dataStream);
    // Read the content.
    var responseFromServer = reader.ReadToEnd();
    responseFromServer.ToArray();
    /*I have tried:
    responseFromServer.ToArray();(because result on php page is an array.
    I have tried responseFromServer.ToString();*/
    MessageBox.Show(responseFromServer);
}

<?php
// Database Structure
require_once('connect.php');

//Get password from the database for the user
$stmtus = $conn->prepare("SELECT password from `Users` where `email` = :Username");
$stmtus->bindParam(':Username', $username);
$username= $_GET['username'];;
$stmtus -> execute();
$password = $stmtus->fetch();

$un = $_GET['username'];
$pw = $_GET['password'];
$ust = $_GET['Token'];

if(password_verify($pw, $password[0])){
$stmt = $conn->prepare("SELECT
COUNT(Token) AS cnt FROM `SoftwareToken`
LEFT JOIN User ON iduser = SoftwareToken.Consultant
WHERE Token = '$ust'
AND username = '$un'");
$stmt->bindValue(':Username', $un);
$stmt->bindValue(':Token', $ust);
$stmt->execute();
$result= array();
while($SToken= $stmt->fetch(PDO::FETCH_OBJ)){
array_push($result, $SToken->cnt);
}
echo json_encode($result);

}

$conn = null;

?>

if (responseFromServer= 1)
        {
            Form1 identykidzform = new Form1();
            identykidzform.Show();

            Password loginform = new Password();
            loginform.Close();
            reader.Close();
            response.Close();
        }
        else
        {
            Application.Exit();
        }