I have set up a calendar for a religious institution. The idea is for the head of each function to handle their own entries: the brotherhood president will enter brotherhood events, the clergy will enter religious services, the religious school director will enter school activities, etc. I've set up sub-calendars for each of these. When I try to give them access, though, I can only see the option that allows me to share the calendar if they have a Trumba account. Am I missing something?