我不知道这是不是你想要的，但是你可以在streamlabs网站的应用程序设置下添加授权用户，如果需要澄清的话请告诉我。

对于捐赠警报，我创建了一个应用程序，工作正常。我在这里分享代码：-

protected void Page_Load(object sender, EventArgs e)
{

    if(Session["Resp"]!=null)
    {
        LBL2.Text=Session["Resp"].ToString();
        return;
    }
    int c=0;
    try
    {
        if (Session["Counter"] == null)
            Session.Add("Counter", 0);
        else{
            c = int.Parse(Session["Counter"].ToString()) + 1;
        }
        lbl1.Text = c.ToString();
        string CD = Request.QueryString["CODE"].ToString();
        code.Value = CD;
        form1.Method = "POST";
        //form1.Action = "https://streamlabs.com/api/v1.0/token";
        form1.Action = "https://streamlabs.com/api/v2.0/token";

        using (WebClient client = new WebClient())
        {
            ServicePointManager.Expect100Continue = true;

            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls
                    | SecurityProtocolType.Ssl3;
            ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

            byte[] response =
            client.UploadValues("https://streamlabs.com/api/v2.0/token", new NameValueCollection()
           {
               { "client_id", client_id.Value },
               { "client_secret", client_secret.Value },
               { "redirect_uri", redirect_uri.Value },
               { "code", CD },
               { "grant_type", grant_type.Value },
           });

            string result = System.Text.Encoding.UTF8.GetString(response);
            token deserializedProduct = JsonConvert.DeserializeObject<token>(result);
            LBL2.Text = result;
            tok.Text = deserializedProduct.access_token;
        }

            
    }
    catch (Exception ee)
    {
    }
    //System.Web.HttpContext.Current.Response.End();  
}

将此文件保存为accessstoken.aspx，运行此代码将端口（在visual studio中）设置为1280，并将Streamlabs应用程序中的重定向URL设置为http：//localhost：1280/accessstoken. aspx。然后在visual studio运行时从streamlabs应用程序运行TryIt链接。将接收AccessToken。然后我使用该访问令牌创建捐赠。请注意：您创建的StreamLabs应用程序需要得到他们的批准。
我使用的捐赠代码：

protected void Button1_Click(object sender, EventArgs e)
    {

        if (acctok == null || acctok.Length < 20)
        {
            Lbl1.Text = "No accesstoken";
            return;
        }

        using (WebClient client = new WebClient())
        {
            ServicePointManager.Expect100Continue = true;

            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls
                    | SecurityProtocolType.Ssl3;
            ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

            client.Headers.Add("Authorization", "Bearer " + acctok);
            client.Headers.Add("Content-Type", "application/json");
            client.Headers.Add("X-Requested-With", "XMLHttpRequest");
            //client.UseDefaultCredentials = true;
            string response = client.UploadString("https://streamlabs.com/api/v2.0/donations","POST", retJson2(txtName.Text, decimal.Parse(txtAmt.Text)));
            string result = response;   // System.Text.Encoding.UTF8.GetString(response);
            RetData2 deserializedProduct = JsonConvert.DeserializeObject<RetData2>(result);
            Lbl1.Text = deserializedProduct.donation_id;

        }
    }

希望能帮上忙。谢谢。