iamUserName not populated into terraform output

[ghost]

Summary

Installed EKS cluster using this terraform module
jx-requirements file provided as terraform output but iamUserName is empty

............................................................
provider: eks
region: "eu-central-1"
registry: "792922990429.dkr.ecr.eu-central-1.amazonaws.com"
project: "792922990429"
gitops: true
environments:

• key: dev
• key: staging
• key: production
  ingress:
  domain: ""
  ignoreLoadBalancer: false
  externalDNS: false
  tls:
  email: ""
  enabled: false
  production: false
  kaniko: true
  secretStorage: vault
  vault:
  aws:
  iamUserName: ""

.......................................

Steps to reproduce the behavior

Install EKS cluster with all defaults

Expected behavior

iamUserName to be populated with :

vault:
aws:
iamUserName: "jenkins-x-vault"

Actual behavior

vault:
aws:
iamUserName: ""

Terraform version

The output of terraform version is:

terraform version
Terraform v0.14.6

Your version of Terraform is out of date! The latest version
is 0.14.8. You can update by downloading from https://www.terraform.io/downloads.html

Module version

source  = "jenkins-x/eks-jx/aws"

Operating system

CentOS 7