I need help with Omada Software. I'm trying to get info from couple of AP110 that i have so i can use it on one of my apps. I did everything that is written on document but everytime i request i get an error.

{"errorCode":-1505,"msg":"The current user does not have permissions to access this site."}

I've a code written in c#. 

using System.Net.Http;
using System.Text;
using System.Text.Json;

string omadacId = "omadacID";
string siteID = "siteID";
string MAC = "MAC";

var handler = new HttpClientHandler
{
    ServerCertificateCustomValidationCallback =
        HttpClientHandler.DangerousAcceptAnyServerCertificateValidator
};

using var client = new HttpClient(handler);

var tokenUrl =
    "https://localhost:8043/openapi/authorize/token?grant_type=client_credentials";

var body = new
{
    grant_type = "client_credentials",
    omadacId,
    client_id = "clientid",
    client_secret = "clientsecret"
};

var tokenResp = await client.PostAsync(
    tokenUrl,
    new StringContent(
        JsonSerializer.Serialize(body),
        Encoding.UTF8,
        "application/json"));

var tokenJson = await tokenResp.Content.ReadAsStringAsync();
Console.WriteLine(tokenJson);

using var doc = JsonDocument.Parse(tokenJson);

string accessToken = doc.RootElement.GetProperty("result").GetProperty("accessToken").GetString();

client.DefaultRequestHeaders.Clear();
client.DefaultRequestHeaders.TryAddWithoutValidation(
    "Authorization",
    $"AccessToken={accessToken}"
);

var url =
    $"https://localhost:8043/openapi/v1/{omadacId}/sites/{siteID}/aps/{MAC}";

var resp = await client.GetAsync(url);
var json = await resp.Content.ReadAsStringAsync();

Console.WriteLine(json);

Any input will be appreciated.