getApiKey function
Retrieves the API key from the storage configuration. Throws an exception if the API key is not defined.
Implementation
Future<String> getApiKey() async {
final config = await getStorageItem(key: 'sgm_config');
final apiKey = config?['apiKey'];
if (apiKey == null || apiKey == '') {
throw Exception('Error: API Key is not defined.');
}
return apiKey;
}