title: AWS Api Gateway Setting the header value to a default value using http Integration
body: <p>I am using AWS API Gateway and I want to set my Integration type to http. I have the integrated url as https:// xxxxxx.com which takes a header "<strong>apikey</strong>". I am not expecting the end user to pass the header rather I want to set the apikey to some constant value. </p>
  
  <p>I see that there is a way to force the user to make him pass the header(by making header required under the Method Request section. However, I want to set it to default.</p>
  
  <p>For example in all the requests which are internally calling the URL inside the API gateway should pass the header value as "12345".</p>