This is an example of a couple actions that would tie together with the omniauth/google stuff

sessions_controller.rb

  class SessionsController < ApplicationController
    
  def new
    redirect_to '/auth/google_oauth2'
  end

  def create  #google oauth callback endpoint
    @account = Account.find session[:account_id]

    auth = request.env["omniauth.auth"]

      @account.settings.google_calendar_uid = auth['uid']
      @account.settings.google_calendar_token = auth[:credentials][:token]
      @account.settings.google_calendar_refresh = auth[:credentials][:refresh_token]
      @account.settings.google_calendar_expires_at = 1346015233
      @account.settings.google_calendar_expires = true
      redirect_to "success_url", :notice => 'Authorized your google calendar!' and return

  end
  
end