client.on('voiceStateUpdate', (oldMember, newMember) => {
  // As this command applies for both joining and leaving a voice channel, we have to filter out only join events. If newMember has the voiceChannel property, it means that it is a join event.
  // If the user left the voice channel, we are just going to ignore it
  if (!newMember.voiceChannel) return
  // Create the new voice channel
  newMember.guild.createChannel('name', { type: 'voice' })
})