[Route("account")]
public class IdentityController : MainController
    // ...
    [HttpGet("signup")]
    public IActionResult SignUp()
        return View();
    [HttpPost("signup")]
    public async Task<IActionResult> SignUp(UserSignUpViewModel signUp)
        if (!ModelState.IsValid)
        {

[Fact]
public async Task Identity_CreateUser_ShouldBeSuccessful()
    // Arrange
    var initialResponse = await _fixture.Client.GetAsync("/account/signup");
    initialResponse.EnsureSuccessStatusCode();
    var antiForgeryToken = _fixture.GetAntiForgeryToken(await initialResponse.Content.ReadAsStringAsync());
    var postRequest = new HttpRequestMessage(HttpMethod.Post, "/account/signup")
        Content = new FormUrlEncodedContent(new Dictionary<string, string>
            { "Name", "John Malone Doe" },
            // ...
    // Act
    var response = await _fixture.Client.SendAsync(postRequest);