public async Task StoreServiceTicketSuccess_ShouldReturnNonEmptyKey()
        {
            // Arrange
            var expected = GenerateNewServiceTicket();

            // Act
            var key = await _serviceTickets.StoreAsync(expected).ConfigureAwait(false);

            // Assert
            Assert.NotNull(key);
        }
        public Task <string> StoreAsync(AuthenticationTicket ticket)
        {
            var serviceTicket = BuildServiceTicket(ticket);

            return(_store.StoreAsync(serviceTicket));
        }