Github has made multiple decisions which, whatever the rationale, damage trust in them as an identity authority and make it more difficult to believe that a Github account represents who it appears to.
They also allow for accounts to be renamed and then for someone unrelated to register the abandoned name:
They also allow for accounts to be renamed and then for someone unrelated to register the abandoned name:
https://www.theregister.com/2018/02/10/github_account_name_r...