Freshdesk c# sso /w timestamp

gistfile1.cs

public ActionResult HelpLogin()
{
	const string key = "abcdefghijklmnopqrtuvwxyz";
	const string pathTemplate = "http://demo.freshdesk.com/login/sso?name={0}&email={1}&timestamp={2}&hash={3}";

	var username = UserHelper.CurrentUser.UserName;
	var email = UserHelper.CurrentUser.Email;
	
	string timems = (DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds.ToString();
	var hash = GetHash(key, username, email, timems);
	var path = String.Format(pathTemplate, Server.UrlEncode(username), Server.UrlEncode(email), timems, hash);

	return Redirect(path);
}

private static string GetHash(string secret, string name, string email, string timems)
{
	string input = name + email + timems;
	var keybytes = Encoding.Default.GetBytes(secret);
	var inputBytes = Encoding.Default.GetBytes(input);

	var crypto = new HMACMD5(keybytes);
	byte[] hash = crypto.ComputeHash(inputBytes);

	StringBuilder sb = new StringBuilder();
	foreach (byte b in hash)
	{
		string hexValue = b.ToString("X").ToLower(); // Lowercase for compatibility on case-sensitive systems
		sb.Append((hexValue.Length == 1 ? "0" : "") + hexValue);
	}
	return sb.ToString();
}

@kirandarisi, I wish there was a way for me to change this gist but gist.github doesn't allow pull requests, the only choice is to fork it, which @darkpssngr has already done (using my code sample and others).

darkpssngr's fork: https://gist.github.com/darkpssngr/726162ed0bd67ffdd616370c65a17e68