public static string GetInvalidToken()
{
byte[] secretKey = Base64UrlDecode(ClientSecret);
DateTime issued = DateTime.Now;
DateTime expire = DateTime.Now.AddHours(10);
ClientId = ClientId.Substring(0, ClientId.Length - 2);
var payload = new Dictionary <string, object>()
{
{ "iss", String.Format("{0}{1}{2}", "https://", Domain, "/") },
{ "aud", ClientId },
//{"sub", String.Format("{0}|{1}", Connection, UserId)},
{ "sub", UserId },
{ "iat", ToUnixTime(issued).ToString() },
{ "exp", ToUnixTime(expire).ToString() }
};
string token = Jose.JWT.Encode(payload, secretKey, JwsAlgorithm.HS256);
return(token);
}