Tips on configuring YouTrack with Power BI are available on Connect Power BI to YouTrack, 180 days free.
For Power Query and Azure Data Factory there are separate pages:
- Connect Power Query to YouTrack, 180 days free
- Connect Azure Data Factory to YouTrack, 180 days free
Tips on acquiring the permanent token in the user interface of YouTrack can be found on How to get a YouTrack permanent token for Invantive SQL and Power BI?.
The data model will be made available on SQL Driver for YouTrack API - YouTrack API Data Model.