public async Task InputIsNull()
            {
                var response = await request.ExecuteAsync(null);

                response.Should().NotBeNull();
                response.ErrorResponse.Should().NotBeNull();
                response.ErrorResponse.ErrorSummary.Should().NotBeNullOrWhiteSpace();
                response.ErrorResponse.ErrorSummary.Should().BeEquivalentTo($"Value cannot be null.{Environment.NewLine}Parameter name: input");
                response.StatusCode.HasValue.Should().BeTrue();
                response.StatusCode.Should().Be(500);
            }
            public async Task InputIsNull()
            {
                var response = await request.ExecuteAsync(null);

                response.Should().NotBeNull();
                response.ErrorResponse.Should().NotBeNull();
                response.ErrorResponse.ErrorSummary.Should().NotBeNullOrWhiteSpace();
                response.ErrorResponse.ErrorSummary.Should().BeEquivalentTo(ExceptionsUtility.NullArgument("input"));
                response.StatusCode.HasValue.Should().BeTrue();
                response.StatusCode.Should().Be(500);
            }