Aiuthenticationmanager does not contain definition for getexternallogininfoasync?

public async Task<ActionResult> ExternalLoginConfirmation(ExternalLoginConfirmationViewModel model, string returnUrl)
       {
           if (User.Identity.IsAuthenticated)
           {
               return RedirectToAction("Manage");
           }

           if (ModelState.IsValid)
           {
               // Get the information about the user from the external login provider
               var info = await AuthenticationManager.GetExternalLoginInfoAsync();// this is error line AIAuthenticationManager does not contain a definition for GetExternalLoginInfoAsync()
               if (info == null)
               {
                   return View("ExternalLoginFailure");
               }
               var user = new ApplicationUser() { UserName = model.UserName };
               var result = await UserManager.CreateAsync(user);
               if (result.Succeeded)
               {
                   result = await UserManager.AddLoginAsync(user.Id, info.Login);
                   if (result.Succeeded)
                   {
                       await SignInAsync(user, isPersistent: false);
                       return RedirectToLocal(returnUrl);
                   }
               }
               AddErrors(result);
           }

           ViewBag.ReturnUrl = returnUrl;
           return View(model);
       }

private IAuthenticationManager AuthenticationManager
     {
         get
         {
             return HttpContext.GetOwinContext().Authentication;// HttpContext does not contain definition of GetOwninContext line of error
         }
     }