Node - Converting file data to a Stream

I have a Node.js app. In that app, a user can upload a file.

const multer  = require('multer')
const upload = multer({ dest: 'uploads/' })

app.put('/files/upload', upload.single('myFile'), function(req, res) {
  let fileData = req.body['myFile'];
  if (fileData ) {
    let commaIndex = fileData.indexOf(',');
    if (commaIndex !== -1) {
      fileData = fileData.substr(commaIndex+1);

       // Convert file data to stream here...
    }
  }
});

I'm trying to figure out how to convert the fileData to a stream. The reason I want a stream is because I'm trying to upload the file to Azure Storage. The API I'm trying to use ([createFileFromStream][1]) requires a stream.

Thank you!

via user70192