Ask HN: How to get 1 karma point

Hello everyone, I'd like to get 1 karma point so that I would have 2 karma points in total, so that I can prove my HackerNews account into my Keybase account. Unfortunately I have no idea how can I gain karma, since I haven't used HackerNews that much. Can someone help me understand how I can get that 1 needed karma point so that I could prove my identity? Thanks... :-)