title: Check what key is added to ssh agent
body: <p>if we want to add our private ssh key we have to write in e.g powershell</p>
  <pre><code>ssh-add ~\.ssh\id_rsa
  </code></pre>
  <p>but is there possibility to check, what key is currently added to agent ?</p>
  <p>I can't find that command on the internet.</p>