Can't make https://{{url}}/oauth2/{{authorizationServerId}}/v1/token work, authorized to use the provided grant type

[ivan_petrov]

I’m trying to get access and refresh tokens using this article and postman collection

here is okta doc: Implement authorization by grant type | Okta Developer

Ii’m getting

{
 "error": "unauthorized_client",
 "error_description": "The client is not authorized to use the provided grant type. Configured grant types: [authorization_code, client_credentials, implicit, refresh_token]." }

I don’t fully follow what to do next. guide say I need native app and I’m pretty sure it worked for web app before.

[vk-giri]

Could you check if you have enabled “Resource Owner” as the Grant type mentioned in step 7 of this doc- Implement authorization by grant type | Okta Developer