public static string GetRedirectUrl(SignOutMessage message, IDictionary<string, object> env, IdentityServerOptions options)
        {
            var result = new LogoutResult(message, env, options);
            var response = result.Execute();

            return response.Headers.Location.AbsoluteUri;
        }
        public static string GetRedirectUrl(SignOutMessage message, IDictionary <string, object> env, IdentityServerOptions options)
        {
            var result   = new LogoutResult(message, env, options);
            var response = result.Execute();

            return(response.Headers.Location.AbsoluteUri);
        }