I used a recruiting tool about 2 years ago that crawled GitHub & other sources, building a profile which including email addresses. One developer's profile did

I used a recruiting tool about 2 years ago that crawled GitHub & other sources, building a profile which including email addresses. One developer's profile didn't have an email address, which I thought was odd, as the email would likely be in a git repo. Sure enough, it was. As I write this, it occurs to me that there's not a foolproof way to verify an email in the developer's GitHub repos belongs to the same developer. GitHub user janedoe may or may not be the same person that made a commit w/ the email address jane@doe.com.