Access management API from hook

[dan.woda]

I think it is possible that you would run into a scenario where the user does not yet exist and you return an Error: 404 User not found.

One of our engineers @stephanie.chamblee just wrote a great FAQ about it:

Can I use a post-user registration action (or hook) to update a user?

Question: Can I use a post-user registration action (or hook) to update a user? Answer: No. If you’d like to make changes to the user when they sign up, such as assign a role or add metadata, it’s best to use a pre-user-registration or post-login action instead. The post-user registration action trigger is designed to notify another system that a user has registered for your application. Use this type of action to execute asynchronous tasks such as adding a user ID to an external system or s…