华为云OCR识别 1.这里开通相关服务权限：https://console.huaweicloud.com/ocr/?agencyId=a2af8c76c9aa4c6ebdb2c5b746fb3f29®ion=cn-north-4&locale=zh-cn#/ocr/management/serviceList/web-image 2.获取Token:https://support.huaweicloud.com/api-iam/iam_30_0001.html 3.统一身份认证服务 IA