How to use the forge-apis.PostBucketsPayload function in forge-apis

res.status(500).json({error: 'Cannot get Google user information, please try again.'});
        return;
      }

      // ForgeSDK OSS Bucket Name: username + userId (no spaces, lower case)
      // that way we have one bucket for each Google account using this application
      var ossBucketKey = 
          config.credentials.client_id.toLowerCase() + 
          (
            user.names[0].displayName.replace(/\W+/g, '') +
            user.resourceName.split('/')[1]
          ).toLowerCase();

      var buckets = new ForgeSDK.BucketsApi();
      var objects = new ForgeSDK.ObjectsApi();
      var postBuckets = new ForgeSDK.PostBucketsPayload();
      postBuckets.bucketKey = ossBucketKey;
      postBuckets.policyKey = "transient"; // expires in 24h

      buckets.createBucket(postBuckets, {}, null, tokenInternal).catch(function (err) {console.log(err);}).then(function () {
        // need the Google file information to get the name...
        drive.files.get({
          fileId: googleFileId
        }, function (err, fileInfo) {
          var fileName = fileInfo.title;
          var ossObjectName = googleFileId + '.' + re.exec(fileName)[1]; // googleId + fileExtension (required)

          // at this point the bucket exists (either created or already there)
          objects.getObjects(ossBucketKey, {'limit': 100}, null, tokenInternal).then(function (response) {
            var alreadyTranslated = false;
            var objectsInBucket = response.body.items;
            objectsInBucket.forEach(function (item) {

new Token().getTokenInternal((tokenInternal, apiInstance) => {
		let buckets = new ForgeSDK.BucketsApi();
    //  let objects = new ForgeSDK.ObjectsApi()
		let postBuckets = new ForgeSDK.PostBucketsPayload();
		postBuckets.bucketKey = myBucketKey;
		postBuckets.policyKey = 'persistent';

		buckets.createBucket(postBuckets, null, apiInstance, tokenInternal).then(() => {
			let mineType = getMineType(filePath);
			let fs = require('fs');

			fs.readFile(filePath, function (err, filecontent) {
				if (err) { errHandler(err, res); res.status(500).end('Error occurred ...'); return; }
				request({
					url: 'https://developer.api.autodesk.com/oss/v2/buckets/' + myBucketKey + '/objects/' + fileName,
					method: 'PUT',
					headers: {
						'Authorization': 'Bearer ' + tokenInternal.access_token,
						'Content-Type': mineType
					},