Create Meetings API function to promote co-organizer to organizer

Would be great to be able to promote a co-organizer of a meeting to be the organizer. This would allow use of the start_meeting function to make it super easy for them to launch the meeting. Almost every new user gets confused and clicks "join meeting" rather than "sign in" first, and then they just sit there and stress out about not being able to launch their meeting.

This would be useful for any organization (like ours) that automatically schedules meetings for more than one person.