Wipe guest accounts on password errors

src/App.vue

@@ -63,6 +63,13 @@ export default {
         })
         .catch((error) => {
           console.log("Error creating client", error);
+          if (error.data.errcode ==='M_FORBIDDEN' && this.currentUser.is_guest) {
+            // Guest account and password don't work. We are in a strange state, probably because
+            // of server cleanup of accounts or similar. Wipe account and restart...
+            this.$store.commit("setUser", null);
+            this.$store.commit("setCurrentRoomId", null);
+            this.$navigation.push({ path: "/login" }, -1);
+          }
         })
         .finally(() => {
           this.loading = false;