public function aktifasi(){
        $this->load->library('email');
        $config['protocol'] = 'smtp';
        $config['smtp_host'] = 'ssl://smtp.gmail.com';
        $config['smtp_port'] = '465';
        $config['smtp_timeout'] = '7';
        $config['smtp_user'] = 'rizal.onetone@gmail.com';
        $config['smtp_pass'] = 'xxxxxxxxxxx';
        $config['charset'] = 'utf-8';
        $this->email->initialize($config);
        $this->email->from('rizal.onetone@gmail.com', 'Polban Dev Team');
        $this->email->to('rinaldydwipermana27@gmail.com');
        $this->email->subject('Aktivasi');
        $this->email->message('Kode Anda adalah: blahblahblah');
        $this->email->send();
    }