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depends how you define "first" ? do you mean the first AZ?

I have a VPC that has 3 public subnets, I need to use a subnet ID for a network association on the client VPN

`network.publicSubnetIds.then(subnets =&gt; subnets[0].apply(subnet =&gt; subnet)),` thats my latest attempt, but it doesn't work

This might help you:

```import * as awsx from "@pulumi/awsx";

const vpc = new awsx.ec2.Vpc("test-vpc", {});

const ue1aPubSub = vpc.publicSubnets.then((a) =&gt; {
  return a
    .filter((s) =&gt; s.subnet.availabilityZone.apply((az) =&gt; az === "us-east-1a"))
    .pop()?.id;
});

export const out = {
  vpcId: vpc.id,
  vpcPubSubIds: vpc.publicSubnetIds,
  vpcPrivSubIds: vpc.privateSubnetIds,
  vpcDataSubIds: vpc.isolatedSubnetIds,
  vpcPubSubCidrs: vpc.publicSubnets.then((a) =&gt;
    a.map((s) =&gt; s.subnet.cidrBlock)
  ),
  vpcPrivSubCidrs: vpc.privateSubnets.then((a) =&gt;
    a.map((s) =&gt; s.subnet.cidrBlock)
  ),
  vpcDataSubCidrs: vpc.isolatedSubnets.then((a) =&gt;
    a.map((s) =&gt; s.subnet.cidrBlock)
  ),
  usEast1aPubSubnet: ue1aPubSub,
};```


```const publicSubnets = await aws.ec2.getSubnetIds({
      vpcId: vpcId,
      filters: [{ name: 'tag:type', values: ['public'] }],
    });

console.log(publicSubnets[0]) // first```
