Absolute novice needing help with an API. Help?

var RC = require('ringcentral')
var rcsdk = new RC({
  server:"https://platform.devtest.ringcentral.com",
  appKey: YOU_APP_CLIENT_ID,
  appSecret:YOUR_APP_CLIENT_SECRET
})
var platform = rcsdk.platform()
login()
function login() {
  platform.login({
    username:process.env.USERNAME,
    password:process.env.PASSWORD
  })
  .then(function(resp){
    console.log("readCallLog by timer")
    readCallLog()
    setInterval(function(){
        readCallLog()
      }, 60 * 60 * 1000); // repeat reading call-log every 60 mins
  })
  .catch(function(e){
    console.log(e)
    throw e
  })
}
function readCallLog(){
  console.log("timed")
  var date = new Date()
  var time = date.getTime()
  // 60-min period
  var lessXXMin = time - (60 * 60 * 1000)
  var from = new Date(lessXXMin)
  var dateFrom = from.toISOString()
  var dateTo = date.toISOString()
  var params = {}
  // See the API reference for more request parameters
  params['type'] = 'Voice'
  params['view'] = 'Detailed'
  params['dateFrom'] = dateFrom.replace('/', ':')
  params['dateTo'] = dateTo.replace('/', ':')
  console.log("date from: " + params.dateFrom)
  console.log("date to: " + params.dateTo)
  var recordingId = ""
  platform.get('/account/~/extension/~/call-log', params)
  .then(function(resp){
    var json = resp.json()
    if (json.records.length > 0){
      var fs = require('fs')
      // Check the API documentation for call log data fields then add whatever you are interested
      var cvs = 'uri,startTime,duration,type,direction,action,result,to_name,from_name,transport'
      for (var record of json.records){
        //console.log(JSON.stringify(record))
        cvs += "
"
        cvs += record.uri + ','
        cvs += record.startTime + ','
        cvs += record.duration + ','
        cvs += record.type + ','
        cvs += record.direction + ','
        cvs += record.action + ','
        cvs += record.result + ','
        if (record.to.hasOwnProperty('name'))
          cvs += record.to.name + ','
        else
          cvs += 'null,'
        if (record.hasOwnProperty('from')){
          if (record.from.hasOwnProperty('name'))
            cvs += record.from.name + ','
          else
            cvs += 'null,'
        }else
          cvs += 'null,'
        cvs += record.transport
        if (record.recording != undefined) {
          console.log("contentUri: " + record.recording.contentUri)
          recordingId = record.recording.id
          console.log(record.recording.contentUri)
          platform.get(record.recording.contentUri)
          .then(function(res) {
            console.log("ok")
            return res.response().buffer();
          })
          .then(function(buffer) {
            console.log("buffer")
            fs.writeFileSync(recordingId + '.mp3', buffer);
          })
          .catch(function(e){
            console.log(e)
            throw e
          })
        }
      }
      // add to your CRM  or other db
      // for demo, I write to a file
      fs.writeFile('call_log_'+dateTo+'.csv', cvs, function(err) {
        if(err)
          console.log(err);
        else
          console.log("call log is saved.");
      })
    }else {
      console.log("No log");
    }
  })
  .catch(function(e){
    throw e
  })
}