diff --git a/FictionArchive.Service.UserService/Services/UserManagementService.cs b/FictionArchive.Service.UserService/Services/UserManagementService.cs
index 9e7a6cb..6a5a496 100644
--- a/FictionArchive.Service.UserService/Services/UserManagementService.cs
+++ b/FictionArchive.Service.UserService/Services/UserManagementService.cs
@@ -86,7 +86,7 @@ public class UserManagementService
         {
             Username = username,
             Email = email,
-            OAuthProviderId = authentikUser.Uid,
+            OAuthProviderId = authentikUser.Pk.ToString(),
             Disabled = false,
             AvailableInvites = 0,
             InviterId = inviter.Id