diff --git a/dbschema/default.gel b/dbschema/default.gel
index a61fad3..c825a40 100644
--- a/dbschema/default.gel
+++ b/dbschema/default.gel
@@ -19,8 +19,11 @@ module default {
     }
 
     multi accesses -> file_access;
+    required property user_id: str {
+      readonly := true;
+    };
 
-    index on ((.file_id, .file_name, .expires_at));
+    index on ((.file_id, .file_name, .expires_at, .user_id));
   }
 
   type file_access {