I properly set the ssh authentication up on my OSX,
ssh -T git@bitbucket.org
is working great, I can push and pull from repositories.
But after some time I got the message
Your account is inactive because it's been a while since you logged in.
Log in at https://bitbucket.org to get back into your account
Same message I got from ssh -T git@bitbucket.org
So I've created a new pair of ssh keys, set them up to use by bitbucket.
And after some time or next session or boot time I got back to same situation.
What might be a problem here?
P.S. I'm working with the same bitbucket repository from different computers, the second computer (Linux) didn't produce any error yet