确认电子邮件时,ASP.NET核心令牌无效,但令牌似乎有效

    var result = await userManager.ConfirmEmailAsync(user, code);

正在生成令牌:

        var code = await userManager.GenerateEmailConfirmationTokenAsync(user);
        var callbackUrl = Url.EmailConfirmationLink(user.Id, code, Request.Scheme);
        var email = user.Email;
        await emailSender.SendEmailConfirmationAsync(email, callbackUrl);

EmailConfirmationLink()和sendmailconfirmationAsync()方法:

    public static string EmailConfirmationLink(this IUrlHelper urlHelper, string userId, string code, string scheme)
    {
        var result = urlHelper.Action(
            action: "ConfirmEmail",
            controller: "ApplicationUsers",
            values: new { userId, code },
            protocol: scheme);

        return result;
    }

    public static Task SendEmailConfirmationAsync(this IEmailSender emailSender, string email, string link)
    {
        return emailSender.SendEmailAsync(email, "Confirm your email",
            $"Please confirm your account by clicking this link: <a href='{HtmlEncoder.Default.Encode(link)}'>Confirm email</a>");
    }

ConfirmEmail()方法:

    public async Task<IActionResult> ConfirmEmail(string userId, string code)
    {
            if (userId == null || code == null)
            {
                // ....
            }
            var user = await userManager.FindByIdAsync(userId);
            if (user == null)
            {
                throw new ApplicationException($"Unable to load user with ID '{userId}'.");
            }               
            var result = await userManager.ConfirmEmailAsync(user, code);