omniauth_figo.rb

require 'omniauth-oauth2'

module OmniAuth
  module Strategies
    class Figo < OmniAuth::Strategies::OAuth2
      # Give your strategy a name.
      option :name, "figo"

      # This is where you pass the options you would pass when
      # initializing your consumer from the OAuth gem.

      option :client_options, {
                                site: 'https://api.figo.me',
                                authorize_url: '/auth/code',
                                token_url: '/auth/token'
                              }

      def build_access_token
        options.token_params.merge!(:headers => {'Authorization' => basic_auth_header })
        super
      end

      def basic_auth_header
        "Basic " + Base64.strict_encode64("#{options[:client_id]}:#{options[:client_secret]}")
      end

      def query_string
        ''
      end

      # These are called after authentication has succeeded. If
      # possible, you should try to set the UID without making
      # additional calls (if the user id is returned with the token
      # or as a URI parameter). This may not be possible with all
      # providers.
      uid{
        user['user_id']
      }


      def user
        MultiJson.load(access_token.get('https://api.figo.me/rest/user').body)
      end

    end
  end
end