before

lib/blocs/authentication_bloc/authentication_bloc.dart

@@ -19,13 +19,23 @@ class AuthenticationBloc
     _userSubscription = userRepository.streamUser().listen((authUser) {
       add(AuthenticationUserChanged(authUser));
     });
-    on<AuthenticationUserChanged>((event, emit) {
-      if (event.user != null) {
-        emit(AuthenticationState.authenticated(event.user!));
-      } else {
-        emit(const AuthenticationState.unauthenticated());
-      }
-    });
+    on<AuthenticationUserChanged>(_onAuthenticationUserChanged);
+    on<AuthenticationLogoutRequested>(_onAuthenticationLogoutRequested);
+  }
+
+  void _onAuthenticationUserChanged(
+      AuthenticationUserChanged event, Emitter<AuthenticationState> emit) {
+    emit(
+      event.user != null
+          ? AuthenticationState.authenticated(event.user!)
+          : const AuthenticationState.unauthenticated(),
+    );
+  }
+
+  void _onAuthenticationLogoutRequested(AuthenticationLogoutRequested event,
+      Emitter<AuthenticationState> emit) async {
+    await userRepository.logOut();
+    emit(const AuthenticationState.unauthenticated());
   }
 
   @override