Luke Skywalker: I was trying not to say the obvious, but you are correct. And from a non-English speaking country as well.

We should do a better job of teaching English in countries where it is the main language it seems.

So I believe we've established that the sentence: "grenv's last action was logging out" is correct.

The alternative
"grenv's last action resulted in him being logged out" is clumsy at best.