Authentication

using var client = new HttpClient();

var form = new Dictionary<string, string>
{
    {"grant_type", "client_credentials"},
    {"client_id", "{CLIENT_ID}"},
    {"client_secret", "{CLIENT_SECRET}"},
};
var content = new FormUrlEncodedContent(form);

var response = await client.PostAsync("https://id-dev.zdata.no/connect/token", content);

OkHttpClient client = new OkHttpClient().newBuilder()
  .build();
MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
RequestBody body = RequestBody.create(mediaType, 
  "grant_type=client_credentials&client_id={CLIENT_ID}&client_secret={CLIENT_SECRET}");

Request request = new Request.Builder()
  .url("https://id-dev.zdata.no/connect/token")
  .method("POST", body)
  .addHeader("Content-Type", "application/x-www-form-urlencoded")
  .build();

Response response = client.newCall(request).execute();

var myHeaders = new Headers();
myHeaders.append("Content-Type", "application/x-www-form-urlencoded");

var urlencoded = new URLSearchParams();
urlencoded.append("grant_type", "client_credentials");
urlencoded.append("client_id", "{CLIENT_ID}");
urlencoded.append("client_secret", "{CLIENT_SECRET}");

var requestOptions = {
  method: 'POST',
  headers: myHeaders,
  body: urlencoded,
  redirect: 'follow'
};

fetch("https://id-dev.zdata.no/connect/token", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

import requests

url = "https://id.zdata.no/connect/token"

payload='grant_type=client_credentials&client_id={CLIENT_ID}&client_secret={CLIENT_SECRET}'
headers = {
  'Content-Type': 'application/x-www-form-urlencoded'
}

response = requests.request("POST", url, headers=headers, data=payload)