FIX: Move title and name out of BasicUserSerializer.

app/serializers/basic_user_serializer.rb

@@ -1,5 +1,5 @@
 class BasicUserSerializer < ApplicationSerializer
-  attributes :id, :username, :avatar_template, :title, :name
+  attributes :id, :username, :avatar_template
 
   def include_name?
     SiteSetting.enable_names?

app/serializers/group_post_serializer.rb

@@ -6,7 +6,7 @@ class GroupPostSerializer < ApplicationSerializer
              :url,
              :category
 
-  has_one :user, serializer: BasicUserSerializer, embed: :object
+  has_one :user, serializer: GroupPostUserSerializer, embed: :object
   has_one :topic, serializer: BasicTopicSerializer, embed: :object
 
   def title

app/serializers/group_post_user_serializer.rb

@@ -0,0 +1,3 @@
+class GroupPostUserSerializer < BasicUserSerializer
+  attributes :title, :name
+end