@startuml
title User Management System

actor Admin
Admin -> [Manage Users]: selects
[Manage Users] -> UserController: create
UserController -> [add_user(user_info)]: call
[add_user(user_info)] -> UserService: create
UserService -> [validate_user_info(user_info)]: call
[validate_user_info(user_info)] -> [Add User to Database]: call
[Add User to Database] --> Database

@enduml