actually save filter

.containerignore

@@ -0,0 +1,7 @@
+.git
+.gitignore
+Dockerfile*
+README.md
+LICENSE
+*.yaml
+statefile

main.go

@@ -54,6 +54,7 @@ func main() {
 	var vtubers []*Vtuber
 	log.Println("Logging into", Homeserver, "as", Username)
 	var client *mautrix.Client
+	uid := id.NewUserID(strings.ToLower(Username), strings.ToLower(HomeserverDomain))
 	if Token == "" {
 		client, err = mautrix.NewClient(Homeserver, "", "")
 		if err != nil {
@@ -61,7 +62,7 @@ func main() {
 		}
 	} else {
 		log.Println("using token login")
-		client, err = mautrix.NewClient(Homeserver, id.NewUserID(Username, HomeserverDomain), Token)
+		client, err = mautrix.NewClient(Homeserver, uid, Token)
 		if err != nil {
 			panic(err)
 		}
@@ -75,11 +76,13 @@ func main() {
 		},
 	}
 	store := mautrix.NewAccountDataStore("simp.batch", client)
-	_, err = client.CreateFilter(dataFilter)
+	fID, err := client.CreateFilter(dataFilter)
+	store.SaveFilterID(uid, fID.FilterID)
 	if err != nil {
 		panic(err)
 	}
 	client.Store = store
+
 	if Token == "" {
 		login_res, err := client.Login(&mautrix.ReqLogin{
 			Type:             "m.login.password",