Added invalid spotify username warning

src/lang/en.mjs

@@ -222,7 +222,8 @@ const en = {
 		noLovedPlaylist: 'No loved tracks playlist!',
 		checkingUpdates: 'Checking for updates...',
 		noUpdateAvailable: 'No updates found',
-		updateAvailable: 'An update is available!'
+		updateAvailable: 'An update is available!',
+		wrongSpotifyUsername: '{username} is not a valid spotify username'
 	},
 	settings: {
 		title: 'Settings',

src/lang/it.mjs

@@ -223,7 +223,8 @@ const it = {
 		noLovedPlaylist: 'Nessuna playlist "Canzoni del cuore"!',
 		checkingUpdates: 'Cercando aggiornamenti...',
 		noUpdateAvailable: 'Nessun aggiornamento trovato',
-		updateAvailable: 'È disponibile un aggiornamento!'
+		updateAvailable: 'È disponibile un aggiornamento!',
+		wrongSpotifyUsername: '{username} non è un username di Spotify valido'
 	},
 	settings: {
 		title: 'Impostazioni',

src/use/favorites.js

@@ -2,6 +2,8 @@ import { ref, computed } from '@vue/composition-api'
 
 import store from '@/store'
 import { fetchData } from '@/utils/api'
+import { toast } from '@/utils/toasts'
+import i18n from '@/plugins/i18n'
 import { SPOTIFY_STATUS } from '@/constants'
 
 const favoriteArtists = ref([])
@@ -27,10 +29,18 @@ const setAllFavorites = data => {
 }
 
 const setSpotifyPlaylists = response => {
-	if (response.error === 'spotifyNotEnabled') {
+	if (response.error) {
 		favoriteSpotifyPlaylists.value = []
-
+		switch (response.error) {
+			case 'spotifyNotEnabled':
 				store.dispatch('setSpotifyStatus', SPOTIFY_STATUS.DISABLED).catch(console.error)
+				break
+			case 'wrongSpotifyUsername':
+				toast(i18n.t('toasts.wrongSpotifyUsername', { username: response.username }), 'person_off')
+				break
+			default:
+				break
+		}
 		return
 	}