It&#x27;s an online course, you need to do some tasks in each lesson. And you get points.<p>That&#x27;s why you need to login with GitHub. 
See more on this: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10384683" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10384683</a>