Mrthdrb

When i'm trying to Login As Customer, it gives below error

a:4:{i:0;s:84:"Invalid method MagentoFrameworkSessionGenericInterceptor::isLoggedIn(Array
(
)
)";i:1;s:11155:"#0 D:wampwwwsmintmagentoappcodeCustomModuleModelDefaultModel.php(201): MagentoFrameworkSessionSessionManager->__call('isLoggedIn', Array)
#1 D:wampwwwsmintmagentoappcodeCustomModuleModelDefaultModel.php(201): MagentoFrameworkSessionGenericInterceptor->isLoggedIn()
#2 D:wampwwwsmintmagentoappcodeCustomModuleModelDefaultModel.php(114): CustomModuleModelDefaultModel->_isUserAuth()

I have already Cleared Cached & Removed data from Var folder

DefaultModel.php

/**
* Copyright © 2016 Magento. All rights reserved.
* See COPYING.txt for license details.
*/

namespace CustomModuleModel;

/**
 * Implementation of Zend_Captcha
 *
 * @author Magento Core Team <core@magentocommerce.com>
 */
class DefaultModel extends Zend_Captcha_Image implements MagentoCaptchaModelCaptchaInterface 

 /**
 * Key in session for captcha code
 */
 const SESSION_WORD = 'word';

 /**
 * Min captcha lengths default value
 */
 const DEFAULT_WORD_LENGTH_FROM = 3;

 /**
 * Max captcha lengths default value
 */
 const DEFAULT_WORD_LENGTH_TO = 5;

 /**
 * @var MagentoCaptchaHelperData
 */
 protected $_captchaData;

 /**
 * Captcha expire time
 * @var int
 */
 protected $_expiration;

 /**
 * Override default value to prevent a captcha cut off
 * @var int
 * @see Zend_Captcha_Image::$_fsize
 */
 protected $_fsize = 22;

 /**
 * Captcha form id
 * @var string
 */
 protected $_formId;

 /**
 * @var MagentoCaptchaModelResourceModelLogFactory
 */
 protected $_resLogFactory;

 /**
 * Overrides parent parameter as session comes in constructor.
 *
 * @var bool
 */
 protected $_keepSession = true;

 /**
 * @var MagentoFrameworkSessionSessionManagerInterface
 */
 protected $_session;

 /**
 * @param MagentoFrameworkSessionSessionManagerInterface $session
 * @param MagentoCaptchaHelperData $captchaData
 * @param MagentoCaptchaModelResourceModelLogFactory $resLogFactory
 * @param string $formId
 */
 public function __construct(
 MagentoFrameworkSessionSessionManagerInterface $session, MagentoCaptchaHelperData $captchaData, MagentoCaptchaModelResourceModelLogFactory $resLogFactory, $formId
 ) 
 $this->_session = $session;
 $this->_captchaData = $captchaData;
 $this->_resLogFactory = $resLogFactory;
 $this->_formId = $formId;
 

 /**
 * Returns key with respect of current form ID
 *
 * @param string $key
 * @return string
 */
 protected function _getFormIdKey($key) 
 return $this->_formId . '_' . $key;
 

 /**
 * Get Block Name
 *
 * @return string
 */
 public function getBlockName() 
 return 'MagentoCaptchaBlockCaptchaDefaultCaptcha';
 

 /**
 * Whether captcha is required to be inserted to this form
 *
 * @param null

You first need to inject the following class in your constructor: /Magento/Customer/Model/Session :

protected $_session;

public function __construct(
 ...
 MagentoCustomerModelSession $session,
 ...
) 
 ...
 $this->_session = $session;
 ...


if ($this->_session->isLoggedIn()) 
 // Customer is logged in 
 else 
 // Customer is not logged in