title: How to get a null value if the header doesn't exist
body: <p>I am using the request context to get the value of the header called "token".</p>
  
  <pre><code> var token = context.request.Headers.GetValues("Token")
  </code></pre>
  
  <p>Now If the header exists. This all works hundreds, But now if the header doesn't exist, I want it to return null. But instead it throws an exception System.InvalidOperationExecption</p>
  
  <p>Is my only option to throw a try catch around it?</p>