diff --git a/AsbCloudInfrastructure/Repository/UserRepository.cs b/AsbCloudInfrastructure/Repository/UserRepository.cs
index d14a4727..8ddbc5f3 100644
--- a/AsbCloudInfrastructure/Repository/UserRepository.cs
+++ b/AsbCloudInfrastructure/Repository/UserRepository.cs
@@ -101,7 +101,8 @@ namespace AsbCloudInfrastructure.Repository
 
             var oldUser = (await GetCacheUserAsync(token)).FirstOrDefault(u => u.Id == dto.Id);
             if (oldUser is null)
-                return 0;
+                throw new ArgumentInvalidException
+                    ($"Invalid id {dto.Id}. You can't edit this user.", nameof(dto));
 
             if (oldUser.Login != dto.Login)
                 await AssertLoginIsBusyAsync(dto.Login, token);
@@ -132,7 +133,8 @@ namespace AsbCloudInfrastructure.Repository
         {
             var user = (await GetCacheUserAsync(token)).FirstOrDefault(u => u.Id == id);
             if (user is null)
-                return 0;
+                throw new ArgumentInvalidException
+                    ($"Invalid id {id}. You can't edit this user.", nameof(id));
             var query = dbContext
                 .Users
                 .Where(u => u.Id == id);