authenticate method
Authenticate at the CARP server.
Implementation
Future<void> authenticate() async {
print('CARP app: $app');
CarpService().configure(app);
print('Authenticating to the CARP Server...');
await CarpService().authenticateWithUsernamePasswordNoContext(
username: username, password: password);
print("Authenticated as user: '$username'");
CarpProtocolService().configureFrom(CarpService());
}