title: Suddenly getting "No supported authentication methods available" when pushing to github
body: <p>I started a github project a few weeks ago. I was able to push changes without any problems (I'm using TortoiseGIT).</p>
  
  <p>Suddenly today when I tried to push my changes, I got "PuTTY Fatal Error" "Disconnected: No supported authentication methods availble" error window.</p>
  
  <p>Anything you can recommend to remedy the problem?</p>