let room = "id room"

client.on("guildMemberAdd", member => {
    let guild = client.channels.get(room).guild.id

    if(member.guild.id != guild) return;
    client.channels.get(room).setName("Welcome "+member.user.username).then(m=> { setTimeout(() => {
        client.channels.get(room).setName(member.guild.name+" - "+member.guild.members.size)
    }, 3000)})
} )

client.on("guildMemberRemove", member => {
    let guild = client.channels.get(room).guild.id

    if(member.guild.id != guild) return;
    client.channels.get(room).setName("Member Left :(").then(m=> { setTimeout(() => {
        client.channels.get(room).setName(member.guild.name+" - "+member.guild.members.size)
    }, 3000)})
})

client.on("voiceStateUpdate" , (oldMember, newMember) => {
    let guild = client.channels.get(room).guild.id

    if(oldMember.guild.id != guild) return;
    let newUserChannel = newMember.voiceChannel
  let oldUserChannel = oldMember.voiceChannel
  if(oldUserChannel === undefined && newUserChannel !== undefined) {
        client.channels.get(room).setName("Hi, "+oldMember.user.username).then(m=> { setTimeout(() => {
            client.channels.get(room).setName(oldMember.guild.name+" - "+oldMember.guild.members.size)
            }, 3000)})
  } else if(newUserChannel === undefined){
        client.channels.get(room).setName("Bye, "+oldMember.user.username).then(m=> { setTimeout(() => {
            client.channels.get(room).setName(oldMember.guild.name+" - "+oldMember.guild.members.size)
        }, 3000)})
  }
} )