title: Enable Provisioned Concurrency for a Lambda Authorizer
body: <p>Using Terraform, I have a confiuration for an AWS HTTP API Gateway like so:</p>
  <pre><code>resource &quot;aws_apigatewayv2_authorizer&quot; &quot;authorizer&quot; {
    api_id = module.api_gateway.this_apigatewayv2_api_id
    name   = &quot;authorizer&quot;
    authorizer_payload_format_version = &quot;2.0&quot;
    enable_simple_responses           = true
    authorizer_result_ttl_in_seconds  = var.authorizer_result_ttl_in_seconds
    authorizer_type  = &quot;REQUEST&quot;
    identity_sources = [&quot;$request.header.Authorization&quot;]
   
    # Problem is below:
    authorizer_uri = module.auth-authorizer-lambda.this_lambda_function_invoke_arn
  }
  </code></pre>
  <p>when I use <code>this_lambda_function_invoke_arn</code>, this works fine but a Concurrency-provisioned version of the Lambda is not called (so the Lambda can work for, like, 4s). Typically one can refer to such a version by <code>this_lambda_function_qualified_arn</code>, but using it would result in an error:</p>
  <pre><code>Error: error updating API Gateway v2 authorizer: BadRequestException: Invalid Authorizer URI:
  arn:aws:lambda:eu-west-1:&lt;account-id&gt;:function:authorizer:5. 
  Authorizer URI should be a valid API Gateway ARN that represents a Lambda function invocation.
  </code></pre>
  <p>How can I configure API gateway to use the particular version of an Authorizer lambda?</p>