Migrate to Todoist API v1

I just stumbled upon this message on https://developer.todoist.com/rest/v2/: 

> DEPRECATED: This is the documentation for the deprecated REST API (v2). Please refer to the new unified [Todoist API v1 documentation](https://todoist.com/api/v1/docs).

This means, in the long run, I need to migrate to the new unified Todoist API v1. 😫