Refresh existing expired notification tokens

Hi Everyone ,

I'm in a bit of a pickle, hopefully someone can provide some guidance.

I have stale Firebase notification tokens in a database for an existing Xamarin application, initially (years back) the application never contained logic to refresh notification tokens.

With the most recent update to the application a background job was implemented with the intention of refreshing tokens, the problem is refreshing existing stale tokens, it doesn't seem that the job runs automatically after the application update is installed (I know this may seem dumb to the more experienced dev, please excuse me).

Technical information:

I've made use of Shiny.Jobs to implement the background job.
I'm currently using Xamarin version number 4.8.0.1451