feat: access to competition is blocked if it is ended

services/frontend/src/shared/stores/user.ts

@@ -7,6 +7,7 @@ interface UserState {
   loading: boolean;
 
   fetchUser: () => Promise<void>;
+  clearUser: () => void;
 }
 
 const useUserStore = create<UserState>((set) => ({
@@ -18,6 +19,10 @@ const useUserStore = create<UserState>((set) => ({
     const user = await getCurrentUser();
     set({ user, loading: false });
   },
+
+  clearUser: () => {
+    set({ user: null });
+  },
 }));
 
-export { useUserStore };
+export { useUserStore };