public ASPNetLambdaProxyMiddleware(RequestDelegate next, IAmazonLambda lambdaClient, IASPNetLambdaProxyConfigSection config)
 {
     _next         = next;
     _lambdaClient = lambdaClient;
     _config       = config;
 }
 public void Dispose()
 {
     _lambdaClient.Dispose();
     _lambdaClient = null;
     _config       = null;
 }