Is there a feature in PhotonChat to force other users to unsubscribe?

Hello.
I want to create a team with a limited number of people using PhotonChat.
I would like to limit the number of subscribers by "MaxSubscribers" and the order of participation is such that when a user joins, he/she can send a message with a UNIX timestamp that he/she has joined and the subscribers will be able to see it.
There is one problem here.
I would like to force users to unsubscribe if they want to unsubscribe because I have set a limit on the number of subscribers.
Otherwise, the next user will not be able to subscribe due to the limit.
I want to force users to leave if they are harassing or annoying.
Is it possible to do this in PhotonChat?
I think "Room" in PhotonRealTime has such a function, but I am asking because I am not able to use the "Room" function this time for my own reasons.
Thank you.