Problem discord.js

function serverStatus(){
    const getServerInfo = async (server) => {
    try {
        const response = await fetch(`https://api.mcsrvstat.us/1/szesciennakraina.pl`)
        const json = await response.json()
        server.players = {
            now: json.players.online,
            max: json.players.max
        }
        let plrs = "Graczy online:" + now + "/" + max
        client.user.setActivity('${plrs}')
    } catch (err) {
        client.user.setActivity('Nie działa.')
    }
    return server
    }
};