title: How to invoke lambda async with AWS ApiGateway HttpApi
body: <p>I'm using the new HTTP Api (The one introduced in December 2019) of AWS Api Gateway.</p>
  
  <p>I used to work with REST Api, which lets you trigger lambda functions async by adding X-Amz-Invocation-Type:Event header.</p>
  
  <p>The new HTTP Api does not let you specify that header, how can I call lambda functions asynchronously?</p>
  
  <p>thanks in advance</p>