Prevent unnecessary api request for chats

lib/api/marianumcloud/talk/talkApi.dart

@@ -47,7 +47,7 @@ abstract class TalkApi<T> extends ApiRequest {
       if(data.statusCode >= 400 || data.statusCode < 200) throw Exception("Response status code '${data.statusCode}' might indicate an error");
     } catch(e) {
       log(e.toString());
-      throw ApiError("Request could not be dispatched: ${e.toString()}");
+      throw ApiError("Request $endpoint could not be dispatched: ${e.toString()}");
     }
     //dynamic jsonData = jsonDecode(data.body);
 

lib/model/chatList/chatProps.dart

@@ -18,6 +18,7 @@ class ChatProps extends DataHolder {
   @override
   void run() {
     notifyListeners();
+    if(_queryToken.isEmpty) return;
     DateTime requestStart = DateTime.now();
 
     GetChatCache(
@@ -27,7 +28,6 @@ class ChatProps extends DataHolder {
 
         _getChatResponse = data;
         notifyListeners();
-
       }
     );
   }