How to restart TTN's handler for NodeJS

Hi, I’m having an issue with the implementation of a feature on my nodeJs application. What I want to do is change the appID or the accessKey of the handler without having to restart the nodejs application.

For example, I have a small form on my website where I write the appID and accessKey and store them on a data base but I want to make the TTN’s handler update immediately to the new values.
Is it possible?

Thank you in advance.