There's also API (https://developer.github.com/v3/migrations/users/ https://developer.github.com/v3/migrations/users/), which doesn't involve web UI or email.

There's also API (https://developer.github.com/v3/migrations/users/ https://developer.github.com/v3/migrations/users/), which doesn't involve web UI or email. The docs says it's "only available to authenticated account owners"; I hope it means you can't use a token for that, but I'm not sure.