Add the following dependency to your **app**'s `pubspec.yaml` along with others you added above in **Prerequisites**:

```yaml
environment:
  sdk: ">=2.15.0 <3.0.0"

dependencies:
  amplify_auth_cognito: ^0.6.0
  amplify_flutter: ^0.6.0
  amplify_storage_s3: ^0.6.0
  flutter:
    sdk: flutter
```