Dependency Injection for access to current User

I'm trying to level up as a developer, and am currently building an app using RxSwift with MVVM. Most of my view models need access to the current user object. In just about every view controller, before I do anything, I have to fetch info for current user from database, and only then, can all other code be executed ( because so much of the logic depends on the state of the User). This also means most code is at least nested one level since fetching user is async. I actually input User into initializer of view model. There must be a better way to persist the current user throughout app. Ive recall reading a bit about dependency injection and how it allows data to be passed along as dependencies to other objects. Is this a scenario where injection could be a viable solution? Im open to other suggestions as well!

Potential solutions I've thought of since time of post

• just pass along User through segues and assign to currentUser property in each view controller

• after login, create a shared observable of type Observable<User> in RootViewController, and subscribe to it wherever need be. But i'd still have to put code into subscription block wherever i subscribe.