application design: frontend architecture in "server-centric" application

I built a REST API with NodeJS, and now I am ready to build a Flutter application that interacts with the server.
The app essentially asks the user to log in, retrieves a token from the server, and then displays information from the server.

The server is designed with Bob Martin's clean architecture, but I feel like it's too much for the client application, which is essentially just making API calls.
So I would like to know how should I design the interface?