Hi Ed,
when you try to view a resource from azure on the UI (debug samples), a popup will appear, asking for credentials, in this case azure query string. it will fill the rest of the fields you see in profile automatically.

Thanks CostlyOstrich36 , you can also get access to the keys in the Azure Storage Explorer.
Looking at the Properties section gives the secure keys.

VivaciousPenguin66 , the resource you have to access in Azure portal is "access keys" under "Security + networking". Input that key under "SECRET/SAS" in profile page

Ah ok, so it's the query string you use with the SAS box. Great.