Odata feed permissions to non-team-members

Hi, 

I am getting my organisation going with using Shifts for Teams, I have some notes, but in general, it's great. The finance dept want the opportunity to create various reports from the raw data themselves from Excel or Power BI (they only know excel, but I'm trying to show them the light!). I can use Odata feed in powerquery to access the data, but I am a member of the teams that I am working with now. I want to be able to grant the users, or 365 groups, who want to view shifts data access to that without them being a member of the team, appearing on the list of members, seeing the chat that comes up, all that jazz. 

 

Looking on Graph explorer it looks like the permission I am looking for is "Schedule.Read.All", but that doesn't help me really as I still can't give that permission to others in Graph.

 

Thoughs?

 

Thanks