Limit admin fields to User/Reddit User, stopping odd error messages

reddit/admin.py

@@ -5,4 +5,10 @@ class RedditAccountAdmin(admin.ModelAdmin):
     list_display = ('username', 'user', 'date_created', 'link_karma', 'comment_karma', 'last_update')
     search_fields = ['username', 'user']
 
+    fields = ('user', 'username')
+
+    def save_model(self, request, obj, form, change):
+        obj.api_update()
+        obj.save()
+
 admin.site.register(RedditAccount, RedditAccountAdmin)