Check if error is a string or an object

[dvh]

Posting a contact with a duplicate customer_id results in the following API response:

422: Unprocessable entity

{
  "error": {
    "customer_id": [
      "already exists"
    ]
  }
}

Unlike other error messages from the Moneybird API, the error is an object instead of a string here. This breaks your code, because it seems that https://github.com/renedx/node-moneybird/blob/master/src/libs/https.js#L31 assumes error is always a string.

[rdzar]

Thanks for your detailed bug-report! This has been fixed in 1.0.2 on NPM.

An example of usage can be found here:
https://github.com/renedx/node-moneybird#example-create-contact-with-fields-error

[dvh]

Great, thanks!