change subMessage return value

 import { gql } from "apollo-boost";
 
 export const SUBSCRIPTION_MSG = gql`
-  subscription subMessage {
+  subscription {
     subMessage {
       id
       text
+      room {
+        id
+        name
+      }
       sender {
         id
         username
+        avatarUrl
       }
       createdAt
     }