title: Cannot login to SourceTree
body: <p>My company has a Bitbucket account with Atlassian. I've downloaded the latest update to Sourcetree; when I try and login my credentials are not accepted.</p>
  
  <p><a href="https://i.stack.imgur.com/M2cU0.png" rel="noreferrer"><img src="https://i.stack.imgur.com/M2cU0.png" alt="Sourcetree login page"></a></p>
  
  <p>The same happens if I access this page through my web browser here: <a href="https://id.atlassian.com/login?application=mac&amp;continue=https://my.atlassian.com" rel="noreferrer">https://id.atlassian.com/login?application=mac&amp;continue=https://my.atlassian.com</a> </p>
  
  <p>However if I try to login to <a href="https://company.atlassian.net/login" rel="noreferrer">https://company.atlassian.net/login</a>? it works fine.</p>
  
  <p>Is there some convention I have to use to tell Atlassian my company name as part of my login user ID (ie username@company)?</p>
  
  <p>Sourcetree won't let me do anything without getting past this screen.</p>