code: function createIntegration(callback) {
        setTimeout(function throttle() {
          let uri = `arn:aws:apigateway:${region}:lambda:path/2015-03-31/functions/${arn}/invocations`
          // console.log(api)
          gateway.createIntegration({
            ApiId: api.ApiId,
            IntegrationMethod: 'POST',
            IntegrationType: 'AWS_PROXY',
            IntegrationUri: uri
          }, callback)
        }, 1000)
      }
docs: setup the integration