getting new refresh token when current one expires

Hello everyone,

I was just assigned to a task where I have to make an automatic process of starting a Workflow using only API calls and I have it but now they are unsure to leave the refresh token static, I found here (https://www.adobe.io/authentication/auth-methods.html#!AdobeDocs/adobeio-auth/master/OAuth/OAuth.md) that refresh tokens last only two weeks so I wanted to know if there is a way to automatically get a new refresh token when my current one expires because the only way I know of getting refresh tokens is the one explained here: https://helpx.adobe.com/sign/kb/how-to-create-access-token-using-postman-adobe-sign.html and this requires a human user to be completed...

Am I missing something or there is a way for services to get new refresh tokens that I don't know of?

thank you for reading me ❤️