title: Authentication failed to bitbucket
body: <p>I'm trying to push my project via the https protocol on bitbucket using sourcetree.<br>
  But I can't connect to bitbucket with my login and password (which work on the website), I have a fatal error : "Authentication failed".  </p>
  
  <p>I read on other posts I can work around the problem using the ssh protocol instead of the https one, so I set up a ssh key following instructions on the <a href="http://www.sourcetreeapp.com/faq">source tree faq</a>.
  But now I don't know how I can change to the ssh protocol when I want to push my code.
  Someone know how I can do this ?
  Thank you.</p>