public function createAdmin(): void
{
    $stmt = $this->db->prepare("
        INSERT INTO users
        (
            username,
            email,
            password,
            full_name,
            level_id,
            status
        )
        VALUES
        (
            'admin',
            'admin@fastpulsa.my.id',
            :password,
            'Administrator',
            99,
            'active'
        )
    ");

    $stmt->execute([
        'password' => password_hash(
            '@1Rinamarlina',
            PASSWORD_DEFAULT
        )
    ]);
}