feat: emit the auth.login event on SSO logins

backend/open_webui/utils/oauth.py

@@ -2050,6 +2050,16 @@ class OAuthManager:
             **({'max_age': cookie_max_age} if cookie_max_age is not None else {}),
         )
 
+        await publish_event(
+            request,
+            EVENTS.AUTH_LOGIN,
+            actor=user,
+            subject_id=user.id,
+            subject_type='user',
+            source='oauth',
+            data={'auth_method': 'oauth', 'provider': provider},
+        )
+
         # Legacy cookies for compatibility with older frontend versions
         if ENABLE_OAUTH_ID_TOKEN_COOKIE:
             response.set_cookie(