ASP.NET MVC 5 Identity 2 PasswordSignInAsync方法始终返回false

我正在编写将用于外部应用程序的代码。我正在尝试使用Microsoft Identity 2.0和ASP.NET MVC5。我自定义了UserViewModel以容纳FirstName和LastName以及其他几个参数。每当我注册用户时，它都会成功登录，但是当我尝试使用电子邮件/密码进行常规登录时。在SignInManager.PasswordSignAsync始终返回false。由于检查框架内部的所有代码，因此我试图弄清楚如何调试情况。我将在此处提供一些代码，以帮助愿意研究它的任何人。提前致谢！

这是Microsoft在其示例中提供的通用登录功能。我在那里什么都没改变。但这是具有错误消息的函数。

public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, change to shouldLockout: true
        var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
        switch (result)
        {
            case SignInStatus.Success:
                return RedirectToLocal(returnUrl);
            case SignInStatus.LockedOut:
                return View("Lockout");
            case SignInStatus.RequiresVerification:
                return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
            case SignInStatus.Failure:
            default:
                ModelState.AddModelError("", "Invalid login attempt.");
                return View(model);
        }
    }

这是登录功能

public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, change to shouldLockout: true
        var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
        switch (result)
        {
            case SignInStatus.Success:
                return RedirectToLocal(returnUrl);
            case SignInStatus.LockedOut:
                return View("Lockout");
            case SignInStatus.RequiresVerification:
                return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
            case SignInStatus.Failure:
            default:
                ModelState.AddModelError("", "Invalid login attempt.");
                return View(model);
        }
    }

这是定制的身份模型

    public class ApplicationUser : IdentityUser
{
    [DisplayName("Prefix")]
    public string Prefix { get; set; }

    [DisplayName("First Name")]
    public string FirstName { get; set; }

    [DisplayName("Last Name")]
    public string LastName { get; set; }

    [DisplayName("Suffix")]
    public string Suffix { get; set; }

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        // Add custom user claims here
        return userIdentity;
    }
}

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("DefaultConnection", throwIfV1Schema: false)
    {
    }

    public static ApplicationDbContext Create()
    {
        return new ApplicationDbContext();
    }

    public System.Data.Entity.DbSet<JBIPlacementTracking.Models.PlacementViewModel> PlacementViewModels { get; set; }

    public System.Data.Entity.DbSet<JBIPlacementTracking.Models.Placement> Placements { get; set; }

    public System.Data.Entity.DbSet<JBIPlacementTracking.Models.PacketStatus> PacketStatus { get; set; }
}

我想知道问题是否可能是我没有自定义的LoginViewModel。

我现在肯定会感到头疼，如果有人有一些好的资源，我将非常感谢与它的链接。

再次感谢您！