API error responses without statusCode are considered successful

[boxmein]

It seems that API responses that have a HTTP status of 4xx or 5xx, but don't include a statusCode field in the JSON body, are considered success responses.

Both responseIsError and responseIsLegacyError return false when statusCode is missing.

javascript-api/src/api-base.ts

Lines 72 to 96 in a04aa38

	function responseIsLegacyError(
	response: ApiResponse,
	): response is LegacyErrorResponse {
	return (
	response.statusCode &&
	Math.floor(response.statusCode / 100) !== 2 &&
	!Object.prototype.hasOwnProperty.call(response, 'error')
	);
	}
	/**
	* Returns true if an ApiResponse is an ClientErrorResponse response, usable as a type guard.
	* @param response an ApiResponse to narrow down
	* @returns true if the ApiResponse is an ClientErrorResponse, false if it is a SuccessResponse
	* @hidden
	*/
	function responseIsClientError(
	response: ApiResponse,
	): response is ClientErrorResponse {
	return (
	response.statusCode &&
	Math.floor(response.statusCode / 100) === 4 &&
	Object.prototype.hasOwnProperty.call(response, 'error')
	);
	}