- `base_url` (string) - This is the base url. (Default: `https://api.ucloud.cn`). - `profile` (string) - This is the UCloud profile name as set in the shared credentials file, it can also be sourced from the `UCLOUD_PROFILE` environment variables. - `shared_credentials_file` (string) - This is the path to the shared credentials file, it can also be sourced from the `UCLOUD_SHARED_CREDENTIAL_FILE` environment variables. If this is not set and a profile is specified, `~/.ucloud/credential.json` will be used.