text: import * as dropbox from '@core/services/dropbox'
  import * as box from '@core/services/box'
  
  const preview = async (req, res) => {
    if(req.params.source === 'box') await box.preview(req, res)
    if(req.params.source === 'dropbox') await dropbox.review(req, res)
  }
  
  export default preview
  