Some changes

src/main.ts

@@ -10,13 +10,14 @@ import ConfirmedForm from '@/components/ConfirmedForm.vue'
 import LoadingComponent from '@/components/LoadingComponent.vue'
 import axios from 'axios'
 import LoginModal from '@/components/LoginModal.vue'
-import { createPinia } from 'pinia'
+import { createPinia, storeToRefs } from 'pinia'
 import VueCookies from 'vue3-cookies'
 import { router } from '@/router/router'
 import { useSiteControlStore } from '@/stores/siteControl.store'
 import { useCategoriesStore } from '@/stores/categories.store'
 import { useOrdersStore } from '@/stores/orders.store'
 import { useContractorsStore } from '@/stores/contractors.store'
+import { useUserStore } from '@/stores/user.store'
 
 const app = createApp(App);
 const pinia = createPinia();
@@ -34,6 +35,16 @@ export const axiosInstance = axios.create({
   withCredentials: true
 });
 
+axiosInstance.interceptors.response.use( (response) => {
+  return response;
+}, (error) => {
+  if (error.response.status == 401) {
+    const userStore = useUserStore();
+    storeToRefs(userStore).username.value = undefined;
+    router.push('/login');
+  }
+});
+
 app.component('VueDatePicker', VueDatePicker);
 app.component('ConfirmationModal', ConfirmationModal);
 app.component('LoginModal', LoginModal);