map name. Optional for public HERE maps and for private BYOD maps. If not given, the layer attributes of all maps are retrieved

Option to filter maps to be listed based on whether they are public, private or both, default value 0: both private and public maps, 1: only public maps, 2: only private maps

A key generated specifically to authenticate API requests. For more information on how to get an API key, see https://developer.here.com/documentation/identity-access-management/dev_guide/index.html .
Other authentication options are Bearer token, see https://developer.here.com/documentation/identity-access-management/dev_guide/index.html or app_id with app_code for backward compatibility.