title: How do you refresh a Google OAuth access token using simple HTTP?
body: <p>I'm getting started with the Google OAuth system using Python. I have looked through the official docs and SO, so I understand that the 'refresh' token is their solution to long-life access.</p>
  
  <p>However I can't anywhere find guidance on the endpoint or method for using the refresh token. I typically use basic HTTP requests rathe than the proprietary libraries and so I just want to know the endpoint and parameters I need to send.</p>
  
  <p>Thanks in advance.</p>