expiration is not specified error

[mjmenger]

When using the module with the example and environment-specific tfvars, the following error stopped the apply.

Error: Error creating API Credential: Invoking CustomAPI RPC: Doing custom RPC using Rest: Unsuccessful custom API POST on /public/namespaces/system/api_credentials, status code 400, body {
│   "code": 3,
│   "message": "expiration is not specified",
│   "details": [
│   ]
│ }, err %!s(<nil>)
│ 
│   with module.app-delivery-network.volterra_api_credential.this,
│   on .terraform/modules/app-delivery-network/vk8s_app.tf line 31, in resource "volterra_api_credential" "this":
│   31: resource "volterra_api_credential" "this" {

a manual edit of the module (included below) did not address the error.

resource "volterra_api_credential" "this" {
  name                  = substr(volterra_virtual_k8s.this.id, 1, 30)
  api_credential_type   = "KUBE_CONFIG"
  virtual_k8s_namespace = local.namespace
  virtual_k8s_name      = format("%s-vk8s", var.adn_name)
  expiry_days           = 10
  lifecycle {
    ignore_changes = [
      name
    ]
  }
}