iOS - Limitations of DCAppAttestService for generating attestation object

Question

I was checking out the documentation for attestKey(_:clientDataHash:completionHandler:) method. The general idea is for our app to use these measures to assert its legitimacy with any server requests for sensitive or premium content. How often can I use attestKey(_:clientDataHash:completionHandler:) to generate an assertion object? Is it ok if we create this object one for each end point? Like create an assertion object for premium content, for profile update and chat messages? There is no clear message around how many times we can generate an attestation object. There is a mention here that we do it once per user per device. Do any one have an opinion or knowledge around this?