Task<ID2LPrincipal> IRequestAuthenticator.AuthenticateAsync(
HttpRequest request,
AuthenticationMode authMode
) {
string cookie = request.GetCookieValue();
string bearerToken = request.GetBearerTokenValue();
string xsrfToken = request.GetXsrfValue();
return AuthenticateHelper( cookie, xsrfToken, bearerToken, authMode );
}