title: How do I resolve the error: "Argument names must not be quoted" in Terraform?
body: <p>I am running Terraform 0.12.24 locally</p>
  <p>I am trying to deploy an API Gateway integration with Lambda</p>
  <p>I am trying to enable AWS API GW CORS with Terraform.</p>
  <p>I have the following resource for the OPTIONS method response:</p>
  <pre><code>resource &quot;aws_api_gateway_method_response&quot; &quot;options_200&quot; {
      rest_api_id   = aws_api_gateway_rest_api.scout-approve-api-gateway.id
      resource_id   = aws_api_gateway_resource.proxy.id
      http_method   = aws_api_gateway_method.options_method.http_method
      status_code   = &quot;200&quot;
  
      response_models {
        &quot;application/json&quot; = &quot;Empty&quot;
      }
  
      response_parameters {
          &quot;method.response.header.Access-Control-Allow-Headers&quot; = true,
          &quot;method.response.header.Access-Control-Allow-Methods&quot; = true,
          &quot;method.response.header.Access-Control-Allow-Origin&quot; = true
      }
      depends_on = [aws_api_gateway_method.options_method]
  }
  </code></pre>
  <p>And I am getting:</p>
  <pre><code>Error: Invalid argument name
  
    on main.tf line 48, in resource &quot;aws_api_gateway_method_response&quot; &quot;options_200&quot;:
    48:       &quot;application/json&quot; = &quot;Empty&quot;
  
  Argument names must not be quoted.
  </code></pre>
  <p>What gives?</p>