Not supporting STS Auth or Aliyun CLI profile config

[frco9]

Hello,

Would it be possible to update implementation to support STS Authentication from environment variables, or even better to respect the Aliyun Profile defined in the CLI config with env variable ALIBABA_CLOUD_PROFILE which allows a lot of flexibility about auth method and brings more security.

I'm open to contribute, however it seems you have not publish the source code of this plugin, could you commit it so that I can submit a pull request ?

Thanks