I am trying to use Discord API Oauth2 to automatically add a user to my guild. Everything what i need is to get access token for this action as data to send in send(data), user discord id and token of my bot app. Everything of this i already have

So when i am starting my scirpt with my tilda.cc site or with my dedicated server using django i got this error everytime

Access to XMLHttpRequest at 'https://discord.com/api/v8/guilds/myguild/members/my_acc' from origin 'http://dedic_ip:8000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

or in tilda

Access to XMLHttpRequest at 'https://discord.com/api/v8/guilds/myguild/members/my_acc' from origin 'http://myproject.tilda.ws' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Here is my code

    <script>
      const makeRequest = (method, url, data) => {
        const xhr = new XMLHttpRequest();
        xhr.withCredentials = true;
        return new Promise(resolve => {
          xhr.open(method, url, true);
          xhr.setRequestHeader('Content-Type', 'application/json');
          xhr.setRequestHeader('Authorization', 'Bot my_bot_token');
          xhr.onload = () => resolve({
            status: xhr.status,
            response: xhr.response
          });
          xhr.onerror = () => resolve({
            status: xhr.status,
            response: xhr.response
          });
          if (method == 'GET') xhr.send();
          if (method != 'GET') xhr.send(data);
        })
      }

      const test = async() => {
        console.log("Starting request ...");
        var data = JSON.stringify({'access_token': 'my_token'})
        console.log("data:", data);
        let request4 = await makeRequest("PUT", 'https://discord.com/api/v8/guilds/myguild_id/members/my_acc_id', data)
        console.log("status:", request4.status);
        console.log("response:", request4.response);

      }
      test()
    </script>

I am new in web so maybe it is useless info but in network console after preflight i have neeaded headers. But PUT request didn't have them option request put request

Also important to mention that i successfully did this PUT request using python requests, my acc was added to guild and no errors happened with this code:

    url = f"{API_ENDPOINT}/guilds/{guild}/members/{user['id']}"
    data = {
        "access_token": access_token,
    }
    headers = {
        "Authorization": f"Bot {botToken}",
        'Content-Type': 'application/json'
    }

    response = requests.put(url=url, headers=headers, json=data)