private Task <IAccount> TryBearerAuthenticationAsync(IOwinEnvironment context, IClient client)
        {
            var bearerHeaderParser = new BearerAuthenticationParser(context.Request.Headers.GetString("Authorization"),
                                                                    logger);

            if (!bearerHeaderParser.IsValid)
            {
                return(Task.FromResult <IAccount>(null));
            }

            logger.Info("Using Bearer header to authenticate request", nameof(TryBearerAuthenticationAsync));
            return(ValidateAccessTokenAsync(context, client, bearerHeaderParser.Token));
        }
        private async Task RevokeHeaderToken(IOwinEnvironment context, IClient client, CancellationToken cancellationToken)
        {
            var bearerHeaderParser = new BearerAuthenticationParser(context.Request.Headers.GetString("Authorization"), _logger);

            if (!bearerHeaderParser.IsValid)
            {
                return;
            }

            var revoker = new TokenRevoker(client, _logger)
                          .AddToken(bearerHeaderParser.Token);

            try
            {
                await revoker.Revoke(cancellationToken);
            }
            catch (Exception ex)
            {
                _logger.Info(ex.Message, source: nameof(RevokeCookieTokens));
            }
        }