How to request OAuth2 token to kong plugin - python-3.x

Question

i am following this tutorial https://medium.com/#far3ns/kong-oauth-2-0-plugin-38faf938a468 and when i request the tokens with
Headers: Content-Type:application/json
Host:api.ct.id
Body:
{
“client_id”: “CLIENT_ID_11”,
“client_secret”: “CLIENT_SECRET_11”,
“grant_type”: “password”,
“provision_key”: “kl3bUfe32WBcppmYFr1aZtXxzrBTL18l”,
“authenticated_userid”: “oneone#gmail.com”,
“scope”: “read”
}
it returns
{
"error_description": "Invalid client authentication",
"error": "invalid_client"
}
no matter what i tried i couldn't fix it, any idea how to make it work properly

Answer 1

You need to create kong developer and it will give you client_id and client_secret_Id. Use those values in generating auth token.

Answer 2

Here is the working c# code.
Option 1
public static string GetOAuthToken(string url, string clientId, string clientSecret, string scope = "all", string grantType = "client_credentials")
{
try
{
string token = "";
if (string.IsNullOrWhiteSpace(url)) throw new ArgumentException("message", nameof(url));
if (string.IsNullOrWhiteSpace(clientId)) throw new ArgumentNullException("message", nameof(clientId));
if (string.IsNullOrWhiteSpace(clientSecret)) throw new ArgumentNullException("message", nameof(clientSecret));
var oAuthClient = new RestClient(new Uri(url));
var request = new RestRequest("Authenticate", Method.POST);
request.AddHeader("Content-Type", "application/json");
var credentials = new
{
grant_type = grantType,
scope = scope,
client_id = clientId,
client_secret = clientSecret
};
request.AddJsonBody(credentials);
var response = oAuthClient?.Execute(request);
var content = response?.Content;
if (string.IsNullOrWhiteSpace(content)) throw new ArgumentNullException("message", nameof(clientSecret));
token = content?.Trim('"');
return token;
}
catch (Exception ex)
{
throw new Exception(ex.Message,ex);
}
}
Option 2
var httpClient = new HttpClient()
var creds = $"client_id={client_id}&client_secret{client_secret}&grant_type=client_credentials";
httpClient.DefaultRequestHeaders.Accept.Clear();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));
var content = new StringContent(creds, Encoding.UTF8, "application/x-www-form-urlencoded");
var response = httpClient.PostAsync("https://myorg/oauth/oauth2/cached/token", content).Result;
var OAuthBearerToken = response.Content.ReadAsStringAsync().Result;