This repository coincides with a walkthrough available to read on Medium here.
The purpose of an API manager is to handle a web service, from its authentication to making requests and handling responses - that will either generate a successful result or a failure.
The manager must ensure type safety along the way; it is fully typed, as are the request and response objects you expect to receive.
To prevent re-inventing the wheel, requests are sent via Javascript's native fetch() API, that works hand-in-hand with the manager.