问题
I want to change my account's user name on GitHub, but I can't find how to do it. Is this possible at all? To clarify, I'm not talking about the user.name parameter in a git repository, but the username of the actual GitHub account.
回答1:
Yes, it's possible. But first read, "What happens when I change my username?"
To change your username, click your profile picture in the top right corner, then click Settings. On the left side, click Account. Then click Change username.
回答2:
Yes, this is an old question. But it's misleading, as this was the first result in my search, and both the answers aren't correct anymore.
You can change your Github account name at any time.
To do this, click your profile picture > Settings > Account Settings > Change Username.
Links to your repositories will redirect to the new URLs, but they should be updated on other sites because someone who chooses your abandoned username can override the links. Links to your profile page will be 404'd.
For more information, see the official help page.
And furthermore, if you want to change your username to something else, but that specific username is being taken up by someone else who has been completely inactive for the entire time their account has existed, you can report their account for name squatting.
来源：https://stackoverflow.com/questions/9191918/change-github-account-username