[Fact]
            public void WithValidUsernamePasswordReturnsTrue()
            {
                // Arrange
                var user = new Freelancer { Id = 1, Active = true, Username = "Username", PasswordHash = "ThisIsThePasswordHash" };
                var securityServiceMock = new Mock<ISecurityService>();
                securityServiceMock.Setup(a => a.ComputeHash("Password", 1)).Returns(() => "ThisIsThePasswordHash");
                var userServiceMock = new Mock<IUserService>();
                userServiceMock.Setup(a => a.GetUser("Username")).Returns(() => user);

                // Act
                var authenticationService = new AuthenticationService(securityServiceMock.Object, userServiceMock.Object);
                var isAuthenticated = authenticationService.Authenticate("Username", "Password");

                // Assert
                Assert.True(isAuthenticated);
            }