TOPIC: How to add airports?

There's some airports not defined in DB. For example LTFM (Istanbul Airport). How can I add them? Or how they should appear in DB?

I've added LTFM now,

thank you.
also these airports are missing:
ULWC
UWSG
UCFO
UCFM

LTFG

Thanks! I'd suggest updating them at ourairports.com which we use as a source. These all are missing or have some issues and are as such not in the downloadable CSV (ourairports.com/data/airports.csv). An example is ourairports.com/airports/LTGP/

Thanks for clarification, didn't find the answer on FAQ. Will update those sources instead.

What about airports that are in that database but don't show up in OpenSky? The one I'm looking at is OTHH, Hamad International Airport in Doha -- shows up in that database (ourairports.com/airports/OTHH/), but not in OpenSky.