Ueberauth: github nickname only; callback domain

Questions & Help Questions
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1
  1. If I’m only interested in the username (nickname) at github, is there a way to achieve that? Basically I’m not interested in emails, I just need to verify that I’m dealing with a few administrators via github auth.

This is my current config:

config :ueberauth, Ueberauth,
  providers: [
    github:
      {Ueberauth.Strategy.Github,
       [
         default_scope: "user:email",
         callback_path: "/auth/github/callback"
       ]}
  ]
  1. I also wonder if this callback_path could be somehow made relative to the current domain?