在ASP.NET核心中的子域之间共享身份验证cookie -无法登录

services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
    .AddCookie(options =>
    {
        options.Cookie.Name = "SharedAuthCookie";
        options.Cookie.Domain = ".example.com"; // 设置为顶级域名，以便在所有子域中共享
        options.Cookie.SameSite = SameSiteMode.None; // 跨域时需要设置为None
        options.Cookie.SecurePolicy = CookieSecurePolicy.Always; // 仅通过HTTPS传输Cookie
        options.Cookie.IsEssential = true; // 设置为必要Cookie，以便在跨域请求中发送
        options.TicketDataFormat = new CustomTicketDataFormat(); // 自定义的TicketDataFormat
    });

public class CustomTicketDataFormat : ISecureDataFormat<AuthenticationTicket>
{
    private readonly IDataProtector _protector;

    public CustomTicketDataFormat()
    {
        var protectorProvider = DataProtectionProvider.Create(new DirectoryInfo("path/to/keys"));
        _protector = protectorProvider.CreateProtector("SharedAuthCookie");
    }

    public string Protect(AuthenticationTicket data)
    {
        var ms = new MemoryStream();
        var writer = new BinaryWriter(ms);
        writer.Write(data.Principal.Identity.Name);
        writer.Flush();
        var protectedBytes = _protector.Protect(ms.ToArray());
        return Convert.ToBase64String(protectedBytes);
    }

    public AuthenticationTicket Unprotect(string protectedText)
    {
        var protectedBytes = Convert.FromBase64String(protectedText);
        var unprotectedBytes = _protector.Unprotect(protectedBytes);
        var ms = new MemoryStream(unprotectedBytes);
        var reader = new BinaryReader(ms);
        var name = reader.ReadString();
        var identity = new ClaimsIdentity("SharedAuthCookie");
        identity.AddClaim(new Claim(ClaimTypes.Name, name));
        var principal = new ClaimsPrincipal(identity);
        return new AuthenticationTicket(principal, "SharedAuthCookie");
    }
}

app.UseAuthentication();
app.UseAuthorization();

app.UseCookiePolicy(new CookiePolicyOptions
{
    MinimumSameSitePolicy = SameSiteMode.None,
    Secure = CookieSecurePolicy.Always
});