title: Cocoapods with private git repository
body: <p>I want to add to podfile private git repository, for example:</p>
  
  <pre><code>pod 'MyLibrary', :git =&gt; 'git@github.com:perfect/top-library.git', :branch =&gt; 'data/myLab'
  </code></pre>
  
  <p>But when I run "pod install" command I receive error:</p>
  
  <pre><code>[!] Error installing MyLibrary
  [!] Failed to download 'MyLibrary'.
  </code></pre>
  
  <p>And the question is how to provide my credentials from git to cocoapods ?</p>