title: aiohttp and client-side SSL certificates
body: <p>I recently moved off from <code>flask</code> + <code>requests</code> onto <code>aiohttp</code> and its async http client.</p>
  
  <p>In my scenario, I need to make a call to an API over <code>HTTPS</code> (with custom certificates) AND send a client-side certificate along.</p>
  
  <p>For the first part (validating custom certs), the support is clear <a href="http://aiohttp.readthedocs.io/en/stable/client.html#ssl-control-for-tcp-sockets" rel="noreferrer">clearly documented int the docs</a> and it works great.</p>
  
  <p>On the other hand, for the second part, I can't seem to be able to find an easy way of attaching a custom SSL client-side certificate to authorise the client.</p>
  
  <p>Do you guys know how to do that ? Many thanks !</p>