How to use the pino-std-serializers.wrapErrorSerializer function in pino-std-serializers

function pinoLogger (opts, stream) {
  if (opts && opts._writableState) {
    stream = opts
    opts = null
  }

  opts = opts || {}
  opts.serializers = opts.serializers || {}
  opts.serializers.req = serializers.wrapRequestSerializer(opts.serializers.req || serializers.req)
  opts.serializers.res = serializers.wrapResponseSerializer(opts.serializers.res || serializers.res)
  opts.serializers.err = serializers.wrapErrorSerializer(opts.serializers.err || serializers.err)

  if (opts.useLevel && opts.customLogLevel) {
    throw new Error("You can't pass 'useLevel' and 'customLogLevel' together")
  }

  var useLevel = opts.useLevel || 'info'
  var customLogLevel = opts.customLogLevel
  delete opts.useLevel
  delete opts.customLogLevel

  var theStream = opts.stream || stream
  delete opts.stream

  var autoLogging = (opts.autoLogging !== false)
  delete opts.autoLogging