MaxMind - Insights (formerly Omni] & License Key & 2.16

Mautic version is: 2.16 addresses the issue of Maxmind requiring a license key.
But it seems as if this is only addressed for the download database option.
Or some documentation would be wellcome.

Is this the right setup:
user:license key

I have bought credits at Maxmind to be able to use the lookup service (not the download database) one. I have created a Key. I would expect a field in Mautic to enter that key. Alternatively user:license key.

I see no errors in the log

Is the setup correct or is the license key field missing?