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you should be able to just pass it to another resource, haev you tried? are you getting an error?

I'm trying to get it to `NewVpcEndpoint`, which takes a `StringArrayInput` for the `SecurityGroupIds` field and it wasn't clear how to convert it as there's no `ToStringOutput` method on `SecurityGroupOutput` and no obvious `ToStringArray*` function for this

```    ./main.go:71:48: cannot use cluster.NodeSecurityGroup (type "<http://github.com/pulumi/pulumi-aws/sdk/v4/go/aws/ec2|github.com/pulumi/pulumi-aws/sdk/v4/go/aws/ec2>".SecurityGroupOutput) as type pulumi.StringInput in slice literal:
        "<http://github.com/pulumi/pulumi-aws/sdk/v4/go/aws/ec2|github.com/pulumi/pulumi-aws/sdk/v4/go/aws/ec2>".SecurityGroupOutput does not implement pulumi.StringInput (missing ToStringOutput method)```

I worked around this with
```	// HACK: cluster.NodeSecurityGroup is a SecurityGroupOutput that doesn't have an accessible ID
	nodeSecurityGroupTag := cluster.ToClusterOutput().ApplyT(func(_ *eks.Cluster) string {
		// use ApplyT to build a StringOutput that depends on cluster
		return prefix + "-nodeSecurityGroup"
	}).(pulumi.StringOutput)
	nodeSecurityGroup := ec2.LookupSecurityGroupOutput(ctx, ec2.LookupSecurityGroupOutputArgs{
		Tags: pulumi.StringMap{"Name": nodeSecurityGroupTag},
	})```

should I file an issue somewhere describing this use case?

should it go in the eks repo or somewhere else?

<https://github.com/pulumi/pulumi-eks/issues/644>