title: Getting a 403 when trying to call a websocket
body: <p>Hey I have a web socket deployed to AWS API gateway with a custom domain and lambda's backing it. I keep getting this error in web console when trying to interact with it through my angular app:</p>
  <pre><code>WebSocket connection to 'wss://customDomain/' failed: Error during WebSocket handshake: Unexpected response code: 403
  </code></pre>
  <p>I am not seeing anything in logs for API Gateway like anything is trying to hit it, and no function invocations on the lambda side.</p>
  <p>I have a deployment for the gateway and best I can tell everything is setup correct. I am trying to move this apigateway from a shared legacy AWS account into a new one using the AWS-CDK so I can confirm from the code level that the setup should be correct.</p>