new GoodchargeStation(options)

Option	Default	Meaning
apiKey	required	The station's key. Throws invalid_api_key if malformed.
baseUrl	https://api.goodcharge.app	API origin.
timeoutMs	10000	Per attempt. Must be a positive integer.
maxRetries	3	Retries after 429, 5xx, a timeout or a network error. Must be a non-negative integer.
fetch	global fetch	Custom fetch implementation.
metricsLabel	key prefix (gc_XXXXXXXX)	The station label in metrics. 1 to 64 characters, no control characters. See Monitoring with Prometheus.

A non-integer or out-of-range timeoutMs or maxRetries, or an invalid metricsLabel, throws invalid_option synchronously, from the constructor, before any request is made.