UrlFetchApp with Drive (multiple pages)

drive_fetch.js

var all_results ={};
    var response = UrlFetchApp.fetch("https://www.googleapis.com/drive/v3/files?q="+mime_type,params); 
    
    var result=JSON.parse(response.getContentText()) ;
    for (var i in result['files']) {
       all_results[result['files'][i]['id']] = result['files'][i]['name'];
    }
    
    while (result['nextPageToken']) {
      var pageToken = encodeURIComponent(result['nextPageToken']);
      
      var new_call = "https://www.googleapis.com/drive/v3/files?"+"pageToken="+pageToken+"&q="+mime_type;
      
      response = UrlFetchApp.fetch(new_call, params);
      result=JSON.parse(response.getContentText()) 
      for (var i in result['files']) {
       all_results[result['files'][i]['id']] = result['files'][i]['name'];
      }
      
    }