//CODE1
    bot.on('voiceStateUpdate', (oldMember, newMember) => {
      let newUserChannel = newMember.voiceChannel
      if (oldUserChannel === undefined && newUserChannel !== undefined) {
        bot.channels.get('text channel ID').send('Hello here!'+ newMember);
      }

Hello here! @toko

//CODE2
      if (newMembers ID = A) {
        bot.channels.get('text channel ID').send('heyyy');
      }else if(newMembers ID = B){
        bot.channels.get('text channel ID').send('ciao');
      }