Get aws ec2 instance metadata using go sdk v2

I try this example: https://aws.github.io/aws-sdk-go-v2/docs/sdk-utilities/ec2-imds/

and go.mod is using: github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.15

but the localip prints as: &{{0xc0002d1680} {map[{}:{[{ false false {map[]}}]}]}}

Anyone have this working?