public async Task Offices_GetIdWithUsers_IsOK()
        {
            var response = await _controller.GetWithUsers(officeId);

            var result      = response as OkObjectResult;
            var resultValue = result.Value as OfficeWithUsersResponse;

            Assert.That(result.StatusCode, Is.EqualTo(200));
            Assert.That(resultValue.Id, Is.EqualTo(officeId));
            Assert.That(resultValue.Name, Is.EqualTo("Headquarter"));
            Assert.IsInstanceOf <IEnumerable <UserShortResponse> >(resultValue.Users);
            Assert.That(resultValue.Users.Count(), Is.EqualTo(2));
        }