code: def find_visible_birthdays(request, data):
      
      if request.user and (request.user.is_teacher or request.user.is_eighthoffice or request.user.is_eighth_admin):
          return data
      data['today']['users'] = [u for u in data['today']['users'] if u['public']]
      data['tomorrow']['users'] = [u for u in data['tomorrow']['users'] if u['public']]
      return data
docs: Return only the birthdays visible to current user.