public void ReturnsExpectedDateTime()
            {
                var utcNow = DateTime.UtcNow;

                var sutTester = new AccessTokenRefreshResponseTester(
                    utcNow: utcNow);

                sutTester.ExpiresIn = 60;

                Assert.Equal(utcNow.AddMinutes(1), sutTester.ExpiresAt);
            }
            public void ReturnsExpectedDateTime()
            {
                var utcNow = DateTime.UtcNow;

                var sutTester = new AccessTokenRefreshResponseTester(
                    utcNow: utcNow);

                sutTester.ExpiresIn = 60;

                Assert.Equal(utcNow.AddMinutes(1), sutTester.ExpiresAt);
            }