public void ShouldGenerateDefaultSigning()
        {
            _options.Setup(s => s.Value).Returns(new JwksOptions()
            {
                KeyPrefix = $"{nameof(JsonWebKeySetServiceTests)}_"
            });
            var sign    = _jwksService.Generate();
            var current = _jwksService.GetCurrent();

            current.Kid.Should().Be(sign.Kid);
        }