- `access_key` (string) - Alicloud access key must be provided unless `profile` is set, but it can also be sourced from the `ALICLOUD_ACCESS_KEY` environment variable. - `secret_key` (string) - Alicloud secret key must be provided unless `profile` is set, but it can also be sourced from the `ALICLOUD_SECRET_KEY` environment variable. - `region` (string) - Alicloud region must be provided unless `profile` is set, but it can also be sourced from the `ALICLOUD_REGION` environment variable.