サンプル
リクエスト
 'access_token=xxxxxxxxxxxxxx&refresh_token=xxxxxxxxxxxxxx&wait_flag=1' \
"https://api.next-engine.org/api_v1_system_tax/info"
レスポンス
{
   "result":"success",
   "count":"2",
   "data":[
      {
         "tax_id":"0",
         "tax_name":"税込"
      },
      {
         "tax_id":"1",
         "tax_name":"税抜"
      }
   ],
   "access_token":"xxxxxxxxxxx",
   "access_token_end_date":"2017-04-13 18:24:53",
   "refresh_token":"xxxxxxxxxxx",
   "refresh_token_end_date":"2017-04-15 18:24:53"
}