private Jws ParseJws(string token)
{
var tokenParts = token.Split('.');
var header = Base64Url.Deserialize <TokenHeader>(tokenParts[0], "JWT token header");
var algorithm = ParseJwsAlgorithm(header.Alg);
return(new Jws
{
Parts = tokenParts,
Header = header,
Algorithm = algorithm
});
}