Refresh token not appearing

Refresh token not appearing

Hello, I was wondering if there is another way of obtaining a refresh token, as following the usual 60-second-code procedure generates a new access token, but not the refresh token, and so i have to repeat everything to get a new token every hour or so, which of course is highly inconvenient, plus i'm trying to incorporate zoho sign into an app, and so this is a no go.
Is there another way to generate access/refresh tokens or am I doing something wrong?
Below is a picture of what results from a refresh token request.

    Nederlandse Hulpbronnen