Authenticating 3rd Party App via Webhook

Hi, I'm trying to set up an integration with another app that our business utilizes, SellerCloud, for use with triggers. SellerCloud utilizes JSON Web Tokens (JWT). A call is necessary to to generate the token, which expires every 60 minutes. Here's SellerClouds documentation:

https://developer.sellercloud.com/dev-article/authentication/

Would it be possible to automatically generate the access token as needed using a Webhook? I'm able to authenticate using a test token I created from SellerClouds testing API testing platform, however I can't imagine having to manually change the token every 60 minutes.