Authentication implementation

[BaltoAF]

Hello,
is there any available implementation of the "Sign In" button ?

I've seen the PR "Added Bearer authentication" which seems Ok for the API side.
But what about the client side ? What is the expected authentication logic, and is is shareable between Web, Maui and MobileBlazor ?

A sample would be great.

PS : Nice job on this project, I like it !