התנתקות

class LoginSystem:
    def __init__(self):
        self.users = {}
        self.logged_users = set()
    
    def register(self, username, password):
        if username not in self.users:
            self.users[username] = password
            print("user registered successfuly")
        else:
            print("user already exists")
    
    def login(self, username, password):
        if username in self.users:
            if password == self.users[username]:
                self.logged_users.add(username)
                print("user logged in successfully")
            else:
                print("password doesn't match")
        else:
            print("user isn't in the system")