How can I await the poker_socket connection after the express-response. I can only find the socket after it has been set (it is accessable from req.session.reload(()=>{req.session.socketids.poker_socket}))

Express response to the GET request:

res.send(`<script src="/socket.io/socket.io.js"></script>
                    <script>
                    const socket = io();
                    let poker_socket;
                    socket.on("nextsetup", (callback)=>{
                        poker_socket = io("/poker");
                        callback();
                    });
                    window.addEventListener("beforeunload", ()=>{
                        poker_socket.disconnect(true)
                    });
         </script>`);

Poker socket behavior:

PokerIO.on("connection", async (poker_socket) => {
    await sockets.anysocketconnection(poker_socket, 0);
});

In sockets.js:

async function anysocketconnection(socket, type){
    return new Promise((resolve, reject) => {
        socket.request.session.reload(()=>{
            try{
                socket.request.session.socketids[types[type]] = socket.id;
//sets the socket.id in the session.socketids.poker_socket
                sockets[type].set(socket.id, socket); //sets the socketid to a poker_socket map
                socket.request.session.save();
            }
            catch{
                console.warn("Already open whilst on running");
                socket.emit("refresh");
            }
            resolve();
        });
    });
}

I tried using a setInterval function to check whether the req.session.reload(()=>{req.session.socketids.poker_socket})) is not null. Is there a better way to achieve this?