**4.3. System interface**

The system has two types of interfaces: The PC screen and mobile device screen for users (**Figure 7**), and the PC screen for the administrator. In the latter, the "ID," "password," "name," "age," "gender," and "email address" of all users can be checked on a list. Additionally, due to the simplification of user management using graphic user interface (GUI), procedures such as the deletion of unauthorized users can be done without depending on the IT literacy of the administrator.
