diff --git a/app/routers/auth.py b/app/routers/auth.py
index 315307c..c447f3d 100644
--- a/app/routers/auth.py
+++ b/app/routers/auth.py
@@ -140,11 +140,13 @@ async def callback(request: Request):
         return RedirectResponse(url="/", status_code=302)
 
     # Map OAuth response to artdag UserContext
+    # Note: account token endpoint returns user.email as "username"
     display_name = data.get("display_name", "")
     username = data.get("username", "")
+    email = username  # OAuth response "username" is the user's email
     actor_id = f"@{username}"
 
-    user = UserContext(username=username, actor_id=actor_id)
+    user = UserContext(username=username, actor_id=actor_id, email=email)
 
     response = RedirectResponse(url=next_url, status_code=302)
     set_auth_cookie(response, user)