title: Git clone private repo, permission denied
body: <p>I am trying to clone a private repository owned by another developer.  I do not have direct communication with this developer.  They sent me a theirusername-id_rsa.pub file and a theirusername-priv.key.ppk file.  I understand the ppk file is specific to to Putty ssh client.  Can someone provide me with steps on how to clone their repo?  I already have git configured with my own account and I think I have to add their ssh key to my ssh/config file or something, but I'm a bit of an ssh noob.</p>
  
  <pre><code>git clone git@github.com:theirusername/pro.git
  Cloning into 'pro'...
  Permission denied (publickey).
  fatal: The remote end hung up unexpectedly
  </code></pre>
  
  <p>Edit: I was able to get access to the github repository and add myself as a collaborator.  Even after doing so I couldn't</p>
  
  <pre><code>git clone git@github.com:theirusername/pro.git
  </code></pre>
  
  <p>however</p>
  
  <pre><code>git clone https://github.com/theirusername/pro.git
  </code></pre>
  
  <p>did work.</p>