Fix guessing phase

server/controller/room.js

@@ -121,4 +121,15 @@ module.exports.validateRoomMembers = (io, roomId) => {
     return validMembers;
 }
 
-module.exports.setCleanupGameState = setCleanupGameState;
+module.exports.setCleanupGameState = setCleanupGameState;
+
+module.exports.getUserName = (userId) => {
+    for (const roomId in rooms) {
+        const room = rooms[roomId];
+        const member = room.members.find(m => m.id === userId);
+        if (member) {
+            return member.name;
+        }
+    }
+    return null;
+};