Favorite Contact in teams

Hi All,

I have a power apps gallery which contains all the office 365 users

For each user in gallery there is a button

When I click on that button against the selected user, that user should be added as a contact in my Microsoft teams.

My Question related to MICROSOFT TEAMS is, how do I get the FAVORITE group GUID, so that i can add use it in power apps to add a contact as a favorite

Please Advise

Best Regards