如何使用asp.net mvc实现自动用户登录

我们使用mvc框架6，身份框架3和EF 7与sql server。web应用需要用户身份验证和授权。但有一种情况，当我们想从查询字符串验证/授权用户。我在创建usermanager/signinmanager有问题。这是login

的AccountController的样子

[Authorize]
public class AccountController : Controller
{
    private readonly ApplicationDbContext _dbContext;
    public AccountController(ApplicationDbContext dbContext, UserManager<ApplicationUser> userManager, SignInManager<ApplicationUser> signInManager)
    {
        _dbContext = dbContext;
        UserManager = userManager;
        SignInManager = signInManager;
    }
    public UserManager<ApplicationUser> UserManager { get; private set; }
    public SignInManager<ApplicationUser> SignInManager { get; private set; }
    //
    // GET: /Account/Login
    [HttpGet]
    [AllowAnonymous]
    public IActionResult Login(string returnUrl = null)
    {
        ViewBag.ReturnUrl = returnUrl;
        return View();
    }
    //
    // POST: /Account/Login
    [HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> Login(LoginViewModel model, string returnUrl = null)
    {
        ViewBag.ReturnUrl = returnUrl;
        if (ModelState.IsValid)
        {
            // This doesn't count login failures towards account lockout
            // To enable password failures to trigger account lockout, set shouldLockout: true
            var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
            if (result.Succeeded)
            {
                return RedirectToLocal(returnUrl);
            }
            if (result.RequiresTwoFactor)
            {
                return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
            }
            if (result.IsLockedOut)
            {
                return View("Lockout");
            }
            else
            {
                ModelState.AddModelError(string.Empty, "Invalid username or password.");
                return View(model);
            }
        }
        // If we got this far, something failed, redisplay form
        return View(model);
    }

对于从URL字符串自动登录，我想创建或实例化SigninManager对象到我，所以我可以使用PasswordSignInAysync方法。但我不知道该怎么做。这是我所拥有的，但我不确定要传递的参数。

    [HttpGet]
    public async Task<IActionResult> Index()
    {
       //from url
       if(Request != null)
        {
            if(Request.Query["emailId"] != null)
            {
                var store = new UserStore<ApplicationUser>(_dbContext);
                var manager = new UserManager<ApplicationUser>(store,null,null,null,null,null,null,null,null,null);
                //var userstore = new IUserStore(ApplicationUser);
                //var user = new UserManager();
                var user = new ApplicationUser { UserName = "someone@XXX.com" };
                var signinmanager = new SignInManager<ApplicationUser>(manager,);
                var result =  await SignInManager.PasswordSignInAsync(Request.Query["emailId"],
                                        Request.Query["TokenId"], false, shouldLockout: false);
                if (result.Succeeded)
                {
                    return RedirectToAction("MyHome", "People");
                }
                return RedirectToAction("MyHome",  "People");
            }
        }

    }