More discussion on the topic:
https://www.reddit.com/r/github/comments/99aovq/unable_to_ac...
https://www.reddit.com/r/github/comments/99aovq/unable_to_ac...
Proof: When searching "github code search login" on hn.algolia.com, it turns up this HN thread from September 2016, nearly 2 years before MS bought GitHub: https://news.ycombinator.com/item?id=12581068