Usage with Steam Guard on?

[RobRoseKnows]

I'd like to be able to use this action with Steam accounts that have Steam Guard enabled, but currently it looks like it doesn't support that. Do you have any guidance on using on accounts where Steam Guard is installed?

[meeuw]

One way of using steamcmd with steam guard enabled is to pre-authenticate (using steamcmd.sh / login) and copy:
MBTF, ConnectCache and Accounts from /home/steam/Steam/config/config.vdf into the github action docker container config.vdf file.

Then only login <username> can be used (without password / steam guard code) and the connect cache should be used (which was previously authenticated using steam guard).

I only haven't tested for how long the ConnectCache lasts.