The client_id of your Developer App. This can be found by visting https://app.oysterhr.com/developer

The secret of your Developer App.

First you need to request an authorization_code. Afterwards you can request a refresh_token.

The code is required when requesting an authorization_code.

The redirect_uri is required when requesting an authorization_code.

A refresh_token is required when requesting a refresh_token. A refresh_token will be provided when requesting an authorization_code