How to add custom attribute with aws-otel-nodejs layer configured for nodejs lambda?

[spongenee]

Hi we are using the aws-otel-nodejs layer for auto instrumentation of our nodejs lambda app and traces are sent to aws XRay. We would like to add custom attributes to the traces. Is that possible while continuing to use the layer?

More specifically, will the following code work?

const { trace } = require("@opentelemetry/api");

function handleUser(user) {
  let activeSpan = trace.getActiveSpan();
  activeSpan.setAttribute("user.id", user.getId());
}