public async Task<ActionResult> LinkLoginCallback()
{
var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync(XsrfKey, User.Identity.GetUserId());
if (loginInfo == null)
{
return RedirectToAction("ManageLogins", new { Message = ManageMessageId.Error });
}
var result = await UserManager.AddLoginAsync(User.Identity.GetUserId(), loginInfo.Login);
return result.Succeeded ? RedirectToAction("ManageLogins") : RedirectToAction("ManageLogins", new { Message = ManageMessageId.Error });
}