# StackOutputReference Methods

- Package: [Aspire.Hosting.AWS](/reference/api/csharp/aspire.hosting.aws.md)
- Type: [StackOutputReference](/reference/api/csharp/aspire.hosting.aws/stackoutputreference.md)
- Kind: `Methods`
- Members: `1`

Supports all classes in the .NET class hierarchy and provides low-level services to derived classes. This is the ultimate base class of all .NET classes; it is the root of the type hierarchy.

## GetValueAsync(CancellationToken)

- Name: `GetValueAsync(CancellationToken)`
- Returns: `ValueTask<string?>`

Gets the value for use as an environment variable.

```csharp
public class StackOutputReference
{
    public ValueTask<string?> GetValueAsync(
        CancellationToken cancellationToken = default(CancellationToken))
    {
        // ...
    }
}
```

## Parameters

- `cancellationToken` (`CancellationToken`) `optional`
  A `Threading.CancellationToken`.