public void NotNullValue_SetsValue()
                {
                    var value = Guid.NewGuid().ToString();

                    var token = new SingleUseToken(value);

                    Assert.Equal(value, token.Value);
                }
                public void WhenCalled_ReturnsToken()
                {
                    SingleUseToken token = "value";

                    Assert.Equal("value", token.Value);
                }