title: Is it possible to alias variables with terraform?
body: <p>To get the current AWS id I do:</p>
  
  <pre><code>data "aws_caller_identity" "current" { }
  </code></pre>
  
  <p>Which makes it available in <code>data.aws_caller_identity.current.account_id</code>. Is there some way to make it available as just <code>account_id</code>? I tried:</p>
  
  <pre><code>variable "account_id" {
    default = "${data.aws_caller_identity.current.account_id}"
  }
  </code></pre>
  
  <p>but it says I can't do string interpolation in variables.</p>