fix logout

Signed-off-by: dignow <linlong1265@gmail.com>

flutter/lib/desktop/pages/desktop_setting_page.dart

@@ -1006,7 +1006,7 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
 
         final newApiServer = await bind.mainGetApiServer();
         if (oldApiServer.isNotEmpty && oldApiServer != newApiServer) {
-          await gFFI.userModel.logOut();
+          await gFFI.userModel.logOut(apiServer: oldApiServer);
         }
         return true;
       }

flutter/lib/models/user_model.dart

@@ -101,10 +101,10 @@ class UserModel {
     await Future.wait([gFFI.abModel.pullAb(), gFFI.groupModel.pull()]);
   }
 
-  Future<void> logOut() async {
+  Future<void> logOut({String? apiServer}) async {
     final tag = gFFI.dialogManager.showLoading(translate('Waiting'));
     try {
-      final url = await bind.mainGetApiServer();
+      final url = apiServer ?? await bind.mainGetApiServer();
       final authHeaders = getHttpHeaders();
       authHeaders['Content-Type'] = "application/json";
       await http