我想在ASP.NET核心身份中为用户创建帐户，但无法将数据插入到表dbo.AspNetUsers中

using Microsoft.AspNetCore.Identity;

public class AccountController : Controller
{
    private readonly UserManager<IdentityUser> _userManager;

    public AccountController(UserManager<IdentityUser> userManager)
    {
        _userManager = userManager;
    }

    public async Task<IActionResult> Register(RegisterViewModel model)
    {
        if (ModelState.IsValid)
        {
            var user = new IdentityUser { UserName = model.UserName, Email = model.Email };
            var result = await _userManager.CreateAsync(user, model.Password);

            if (result.Succeeded)
            {
                // 用户账户创建成功
                // 可以进行其他操作，如登录用户等
                return RedirectToAction("Index", "Home");
            }
            else
            {
                // 用户账户创建失败
                // 可以处理错误信息
                foreach (var error in result.Errors)
                {
                    ModelState.AddModelError("", error.Description);
                }
            }
        }

        return View(model);
    }
}