InvalidOperationException: Cannot create a DbSet for ‘ApplicationUser’
because this type is not included in the model for the context.

启动：

services.AddIdentity<ApplicationUser,IdentityRole>(options =>
{
    //password options
    options.Password.requiredigit = false;
    // ...
})

我使用的是标准的ApplicationUser：

public class ApplicationUser : IdentityUser
{
}

在AccountController中注册操作：

public async Task<IActionResult> Register(Registerviewmodel viewmodel)
{
    if (ModelState.IsValid)
    {
        var user = new ApplicationUser { UserName = viewmodel.UserName,Email = viewmodel.Email };
        var result = await _userManager.CreateAsync(user,viewmodel.Password); //<-- Exception happens here
        if (result.Succeeded)
        {
            await _signInManager.SignInAsync(user,isPersistent: false);
            _logger.LogInformation(3,"User created a new account with password.");
            return RedirectToAction(nameof(HomeController.Index),"Home");
        }

        string errorData = "";
        foreach (var error in result.Errors)
        {
            errorData += error.Description + '\n';
        }
        StoreErrorMessage("Failed to create the user!",errorData);
    }

    return View(viewmodel);
}

我已经尝试过以下方法：

>添加DbSet< ApplicationUser>到AplicationContext
>我确实通过dotnet ef创建并应用了新的迁移