diff --git a/server/models/workspace.js b/server/models/workspace.js
index 501d5fb9..e59ac4d8 100644
--- a/server/models/workspace.js
+++ b/server/models/workspace.js
@@ -232,6 +232,7 @@ const Workspace = {
       const userInfo = usersById.map((user) => {
         const workspaceUser = users.find((u) => u.user_id === user.id);
         return {
+          userId: user.id,
           username: user.username,
           role: user.role,
           lastUpdatedAt: workspaceUser.lastUpdatedAt,
diff --git a/server/swagger/openapi.json b/server/swagger/openapi.json
index 2a1b5543..38e5ddc4 100644
--- a/server/swagger/openapi.json
+++ b/server/swagger/openapi.json
@@ -530,11 +530,15 @@
                     "users": [
                       {
                         "userId": 1,
-                        "role": "admin"
+                        "username" : "user_1",
+                        "role": "admin",
+                        "lastUpdatedAt" : "2024-06-10T12:37:52.128Z"
                       },
                       {
                         "userId": 2,
-                        "role": "member"
+                        "username" : "user_2",
+                        "role": "member",
+                        "lastUpdatedAt" : "2024-06-12T19:10:07.529Z"
                       }
                     ]
                   }
@@ -2456,4 +2460,4 @@
       "BearerAuth": []
     }
   ]
-}
\ No newline at end of file
+}