title: API Gateway authenticating with sigv4 gives "message: Missing Authentication Token"
body: <p>I implemented sigv4 authentication on my requests to my API but I am getting { "message": "Missing Authentication Token" } as a response whenever I try to hit it. When I test out using Postman with the same host, authorization headers, content-type, access key, secret key, region, and service name, the call works. Does this mean that I am not sending the request with the headers correctly or generating the authorization headers right?</p>