This is a simple plugin demonstrating a Login Form for "Frontend Users".
Once logged in, you should be able to access the exemplary Member Area.
If you installed the demo site yourself, you can create a Frontend User via the command:
./flow user:create --authentication-provider "Flowpack.Neos.FrontendLogin:Frontend" --roles "Flowpack.Neos.FrontendLogin:User"
On our demo installations there is a user setup with a username "member" and a password "password".
Note: In the demo site we use the same User domain model for Frontend and Backend, but the Login/Logout plugin is agnostic to the user implementation and you should consider creating a custom User model.