https://help.aliyun.com/document_detail/28657.html?spm=a2c4g.11174283.6.575.2c005662zHm4FA
APP临时授权
https://help.aliyun.com/document_detail/28656.html?spm=a2c4g.11186623.6.574.7aa878a5sokTFb
企业ram用户管理和分权
http://gosspublic.alicdn.com/ram-policy-editor/index.html?spm=a2c4g.11186623.2.11.200740afF6tCXm
自定义ram权限