Model Login

public function check_user()
	{
		$username = $this->input->post('username');
		$password = $this->input->post('password');

		$query = $this->db->where('username', $username)
						  ->where('password', $password)
						  ->get('user');

		if($query->num_rows() > 0)
		{
			$data_login = $query->row();

			//membuat data array untuk menyimpan informasi session
			$data = array(
				'id_user'	=> $data_login->id_user,
				'username'	=> $data_login->username,

				'otoritas'	=> $data_login->otoritas,

				'logged_in'	=> TRUE
			);

			$this->session->set_userdata($data);

			return TRUE;
		} else {
			return FALSE;
		}
	}