# File lib/omniauth/strategies/oauth2/gowalla.rb, line 24
      def auth_hash
        OmniAuth::Utils.deep_merge(
          super, {
            'uid' => user_data['url'].split('/').last,
            'user_info' => user_info,
             'credentials' => {'refresh_token' => @access_token.refresh_token},
            'extra' => {
              'user_hash' => user_data,
              'refresh_token' => refresh_token,
              'token_expires_at' => token_expires_at,
            },
          }
        )
      end