Using a store outside of a component

Behind the scenes, useStore() injects the pinia instance you gave to your app

This means that if the pinia instance cannot be automatically injected, you have to manually provide it to the useStore() function

If you are not doing any SSR (Server Side Rendering), any call of useStore() after installing the pinia plugin with app.use(pinia) will work

const pinia = createPinia()
const app = createApp(App)
app.use(pinia)

// ✅ works because the pinia instance is now active
const userStore = useUserStore()