Hello @James,
Thanks for your question. Have you added the asset to My Assets through the Asset Depot yet? If not, open up the ion GUI and click on Asset Depot in the top menu. Then search for “Earth at Night” and press the + button beside it to add it to your assets.
After that, you should see “Earth at Night” on your My Assets page, and you can then use it however you like.
EDIT: Realized that you’re looking for Bing Maps Aerial with Labels, not Earth at Night, but it will work the same way. Look for the asset under Asset Depot and then add it to My Assets.
Matt