[ADDED] Migration to update existing user's displayed names

allianceauth/services/modules/smf/migrations/0003_set_smf_displayed_names.py

@@ -0,0 +1,29 @@
+from django.db import migrations
+from ..manager import SmfManager
+
+def on_migrate(apps, schema_editor):
+    SmfUser = apps.get_model("smf", "SmfUser")
+    db_alias = schema_editor.connection.alias
+    all_smf_users = SmfUser.objects.using(db_alias).all()
+
+    for smf_user in all_smf_users:
+        try:
+            auth_user = smf_user.user
+        except:
+            pass
+        else:
+            SmfManager.update_display_name(auth_user)
+
+def on_migrate_zero(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('smf', '0002_service_permissions'),
+    ]
+
+    operations = [
+        migrations.RunPython(on_migrate, on_migrate_zero),
+    ]