diff --git a/game/groupservice/group-model.js b/game/groupservice/group-model.js
index 64c70a2..c404eb5 100644
--- a/game/groupservice/group-model.js
+++ b/game/groupservice/group-model.js
@@ -3,7 +3,8 @@ const mongoose = require('mongoose');
 // TODO: HACER AQUI LA ENTIDAD GRUPO
 
 const groupSchema = new mongoose.Schema({
-    // ...
+    groupName: String,
+    numberOfMembers: int
 });
 
 const Group = mongoose.model('Group', groupSchema);
diff --git a/users/authservice/auth-model.js b/users/authservice/auth-model.js
index 7763b51..57f9ada 100644
--- a/users/authservice/auth-model.js
+++ b/users/authservice/auth-model.js
@@ -4,6 +4,7 @@ const userSchema = new mongoose.Schema({
     username: String,
     password: String,
     createdAt: Date,
+    groupName: String 
 });
 
 const User = mongoose.model('User', userSchema);