members = session_api.messages.getConversationMembers(peer_id = event.object.peer_id)
for i in members["items"]:
if i["member_id"] == тут айди:
admin = i.get('is_admin', False)
if admin == True:
действие()
print(vk.method("messages.send", {"peer_id": event.obj["peer_id"], "message": "", "random_id": 0}))