example of format function option

gistfile1.txt

function accounts (opts) {
  this.format = opts.format
}

accounts.prototype.create = function (req, res, cb) {
  var self = this
  
  parseBody(req, function (err, body) {
    var body = self.format(body)
    
    cb(err, body)
  })
}

var a = new accounts({
  format: function (body) {
    body.cool = 'yep'
    return body
  }
})