The authorization code received from the authorization server. Required when grant_type is "authorization_code".

Required for clients with PKCE flow when using authorization code. Use together with `grant_type=authorization_code`. This is the value whose hash was sent as `code_challenge` when starting the flow.

The grant type for the token request. Must be "authorization_code" for the authorization code flow or "refresh_token" when refreshing an access token.

The redirect URI that was used in the authorization request. Required when grant_type is `authorization_code`.

The refresh token from the last grant if the `offline_access` scope was included. Use together with `grant_type=refresh_token`.