Terragrunt region & Account paramaters should be variable

[jdn-za]

      env_vars = {
        TF_VAR_aws_assume_role_arn = "${get_env("TF_VAR_aws_assume_role_arn", "arn:aws:iam::323330167063:role/atlantis")}"
        AWS_DEFAULT_REGION         = "us-west-2"

I am guessing that the region should no be hardset but rather make use of TF_VAR_region & env var TF_VAR_account_id

https://github.com/cloudposse/root.cloudposse.co/blob/master/conf/terraform.tfvars#L30