Node.js SDK 429 handling for bulk user updates

Running into 429s when updating 5k users via putUsersUser. I know the SDK has a retry mechanism, but it seems to be hammering the endpoint anyway before backing off. Is there a way to inject a custom exponential backoff strategy directly into the ApiClient config? Currently just getting rate limited hard. Here’s the setup:

const api = new PlatformClient.ApiClient();
api.setConfig({ retryCount: 3 });

It’s not enough.