If you take no special steps, Lucy will ask the user for a key the first time the user tries to load Bing Maps data. This key will be stored by Lucy so that the user only needs to provide it once.
If you want to provide an application to the end-user which includes a Bing Maps key, you configure it in the configuration file
as the value of the
See How to obtain a Bing Maps key for more information on how to obtain a key.