no message

example/lib/main.dart

@@ -18,6 +18,20 @@ class MyApp extends StatefulWidget {
 }
 
 class _MyAppState extends State<MyApp> {
+  Future<void> send() async {
+    OpenIM.iMManager.messageManager
+        .sendMessage(
+            userID: "724f91aceb434a28a1cd10f5564b2c68",
+            message: await OpenIM.iMManager.messageManager
+                .createTextMessage(text: 'hello openim'),
+            offlinePushInfo: OfflinePushInfo(title: 'title', desc: 'desc'))
+        .then((value) {
+      print('send success');
+    }).catchError((error) {
+      print('send error');
+    });
+  }
+
   @override
   void initState() {
     super.initState();
@@ -39,6 +53,7 @@ class _MyAppState extends State<MyApp> {
         .then((value) {
       List<String> list = [];
       OpenIM.iMManager.userManager.subscribeUsersStatus(list);
+      send();
       OpenIM.iMManager.conversationManager
           .getAllConversationList()
           .then((value) {