diff --git a/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs b/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
index 01e4261b..62379133 100644
--- a/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
+++ b/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
@@ -35,7 +35,7 @@ public class UserService : IUserService
         if (string.IsNullOrEmpty(user.UserName))
         {
             // generate unique name
-            var name = user.Email.Split("@").First() + "-" + Nanoid.Generate("0123456789botsharp", 6);
+            var name = Nanoid.Generate("0123456789botsharp", 10);
             user.UserName = name;
         }
         else