param([string] $path, [string]$username, [string]$password)

$username = 'testuser'
$password = 'testpassword'

if ($path -eq $null -or $path -eq '')
{
    $path = 'C:\\Program Files (x86)\\FileZilla Server'
}

$configPath = '{0}\\FileZilla Server.xml' -f $path

function Get-MD5([string]$Content)
{
    $cryptoServiceProvider = [System.Security.Cryptography.MD5CryptoServiceProvider];
    $hashAlgorithm = new-object $cryptoServiceProvider
    $bytes = [System.Text.Encoding]::Default.GetBytes($Content)
    $hashByteArray = $hashAlgorithm.ComputeHash($bytes);
    $formattedHash = [string]::join("",($hashByteArray | foreach {$_.tostring("X2")}))
    return $formattedHash.ToLower();
}

$password = Get-MD5($password)

[xml]$config = Get-Content $configPath

$users = $config.LastChild.LastChild
$newuser = $users.FirstChild.CloneNode(1)
$newuser.SetAttribute('Name', $username)

$password_option = $newuser.FirstChild
$password_option.InnerText = $password

$password_option

$users.AppendChild($newuser)

$config.Save($configPath)