Is there a way to disconnect a client by id from the server?

I want to know if is there a way to do something like the following:

const server = new colyseus.Server({ ... });

// Somewhere on a room:

...
async onJoin(client) {
   if (someLogin) {
        // This disconnects a client based on id
       this.server.disconnect(anotherClientId);
   }
}
...

I would like such a feature, to be able to make a client only join a single room at a time, for example. Or if an account is logged in two computers, disconnect the older connection.

...
let playerList=new Map();//store player client info
async onAuth(Client client,options){
   
    if(validate(options.token){
    //if already joined
    if(playerList.get(options.token)){
          //disconnect old clients
          this.clients.foreach(oldClient){
            if(client.id==playerList.get(options.token)) oldClient.discontent();
         }
    }
        playerList.set(options.token,client.id,)
    }

}

...

This won't work in a @colyseus/proxy so it's not really a good solution.