// ❌ Before
{
  path: '/whoami/:parameter',
  method: 'post',
  handler: async (req) => {
    return Response.json({
      name: req.data.name, // data will be undefined
      // locales will be undefined
      fallbackLocale: req.fallbackLocale,
      locale: req.locale,
    })
  }
} 

// ✅ After
import { addDataAndFileToRequest } from '@payloadcms/next/utilities'
import { addLocalesToRequest } from '@payloadcms/next/utilities'

{
  path: '/whoami/:parameter',
  method: 'post',
  handler: async (req) => {
    // mutates req, must be awaited
    await addDataAndFileToRequest(req)
    
    // mutates req
    addLocalesToRequest(req)
	  
    return Response.json({
      name: req.data.name, // data is now available
      fallbackLocale: req.fallbackLocale, // locales available
      locale: req.locale,
    })
  }
}