public async Task FindPhoneAsync_ShouldBeNotFoundObjectResult()
        {
            // Arrange
            var user = TestData.FileStorage.GetUsers().First();

            TestMock.UserService.Setup(userService => userService.GetUserAsync(It.IsAny <ClaimsPrincipal>())).ReturnsAsync(user).Verifiable();

            TestMock.UserService.Setup(userService => userService.GetPhoneNumberAsync(It.IsAny <User>())).Verifiable();

            var controller = new PhoneController(TestMock.UserService.Object, TestMapper);

            // Act
            var result = await controller.FindPhoneAsync();

            // Assert
            result.Should().BeOfType <NotFoundObjectResult>();
            TestMock.UserService.Verify(userService => userService.GetUserAsync(It.IsAny <ClaimsPrincipal>()), Times.Once);
            TestMock.UserService.Verify(userService => userService.GetPhoneNumberAsync(It.IsAny <User>()), Times.Once);
        }