[OpenSER-Users] Unauthorized Calls - [Openser - X-lite]

Hello, I implemented an environment using to openser + mysql. The enviroment functions perfectly, however I perceived that users (branches) not registered in mysql are generating called. I installed the X-lite softphone in my computer trying to reproduce the situation. In the properties of configuration of the X-lite, "field Password" I type "trash" as password (wrong password). The display of X-lite showed the following message: "Registration error: 401 - Unauthorized". In the contacts drawer I add a contact (double click on the new contact), and the call was generate without restriction (very bad). Some idea of as I solve this problem? Thanks Regards Jeferson