function signin($username='', $password='') {
		if (isset($username) && isset($password)) {
			$customer = $this->Customer->find('first', array('conditions' => array('Customer.customers_username' => $username)));
			if (!empty($customer['Customer']['customers_id']) && $customer['Customer']['customers_password'] == md5($password)) {
				$data = array('Customer' => array('username' => $username, 'password' => $password));
				$this->Auth->login($data);
				$sessionInfo = $this->Session->read();
				$output = array(
					'loginResponse' => array(
						'sessionID'	=> $sessionInfo['Config']['userAgent']
					)
				);
			} else {
				$output = array(
					'error' => array(
						'errorCode'		=> 'INVALID_LOGIN',
						'description'	=> 'Invalid username or password'
					)
				);
			}
			$this->set('output',$output);
		}

	}