musicHandler2.js

class Music {
  ...

  getRecommendation(message, bot) {
    store.update(message.from, {
      command: commands.GET_RECOMMENDATION,
      spotify: {
        numberOfRecs: message.text
      }
    })

    const state = store.getState(message.from)
    const selectedGenre = state.spotify.genre
    const numberOfRecs = state.spotify.numberOfRecs

    return MusicService.getRecommendation(selectedGenre, numberOfRecs)
      .then(sendRecommendation)

    function sendRecommendation(resp) {
      if (!resp.length) return bot.sendMessage(message.from, 'Sorry, looks like I don\'t have anything for that category 🐣')

      bot.sendMessage(message.from, 'Why not give this a listen 💃')

      resp.forEach((song) => {
        bot.sendMessage(message.from, song)
      })

      store.clearState()
    }
  }

  ...
}