app/controllers/sessions_controller.rb


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class SessionController < ApplicationController
  def new
    # This route is catched by the Omniauth Middleware and is invisible to rake routes
    redirect_to '/auth/github'
  end

  def create
    user = User::Authenticable.authenticate(authorize_params)
    session[:uid] = user.uid
    redirect_to root_path
  end

  def destroy
    session.delete(:uid)
    redirect_to root_path
  end

  private

  def authorize_params
    request.env.fetch('omniauth.auth')
  end
end