fix rocket chat session

src/app/services/chat/room.service.ts

@@ -42,6 +42,11 @@ export class RoomService {
   mgsArray = [];
 
   scrollDown = () => { }
+
+  /**
+   * @description get user list from ws-chat-methods.service
+   * @returns chatUser[]
+   */
   getAllUsers  = (): chatUser[]  => {
     return []
   }