title: How to authorize colab with Github?
body: <p>When selecting option on Google colab "Save a copy on Github" I receive message : </p>
  
  <p><a href="https://i.stack.imgur.com/Sypkh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Sypkh.png" alt="enter image description here"></a></p>
  
  <p>From reading <a href="https://medium.com/tensorflow/colab-an-easy-way-to-learn-and-use-tensorflow-d74d1686e309" rel="nofollow noreferrer">https://medium.com/tensorflow/colab-an-easy-way-to-learn-and-use-tensorflow-d74d1686e309</a> this option should be available ? </p>
  
  <p>Should another an Github authorization link appear as part of above authorization popup ?</p>