This resource returns list of trailers for the account.
It returns only registration number, additional data can be fetched using /trailer/{number} resource.

  {
    "msg": "Trailers list",
    "error": false,
    "_data": [
      "XYZ1234",
      "FOO9999",
      "BAR8888",
    ],
    "status": 200
  }

  {
    "error": true,
    "msg": "No trailers found for given account.",
    "status": 406
  }