I am building a video conferencing application using React Native and I have the basic Chime demo set up and working properly. However, I only want a particular set of users to be able to create meetings and the rest should only be able to join existing meetings. Instead of all users being able to create and start meetings, I want some users to be able to check and see if a meeting with a given meetingId is already in progress and then be able to join but if the meeting doesn’t already exist, do nothing or show a “The meeting hasn’t started yet.” message.