Hjdcti

I want to allow the customer to Log in using email or mobile number on the checkout page and the login page.

Note: Mobile number is customer eav attribute.

For Login with the customer, First you need to make mobile number required field in customer Registration form. Whenever customer register, At that time you need to add a field like mobile no. and save that field to Customer registration page.

Now when customer login at that time they enter email id or mobile number. For this you need to override this controller

MagentoCustomerControllerAccountLoginPost

in your module and add code like below, Path should be like: app/code/Vendor/Modulename/Controller/Account/LoginPost.

Now keep below code in your controller,

<?php
namespace VendorModulenameControllerAccount;

use MagentoCustomerModelUrl as CustomerUrl;
use MagentoFrameworkDataFormFormKeyValidator;
use MagentoCustomerModelAccountRedirect as AccountRedirect;

class LoginPost extends MagentoCustomerControllerAccountLoginPost

 public function __construct(
 MagentoFrameworkAppActionContext $context,
 MagentoCustomerModelSession $customerSession,
 MagentoCustomerApiAccountManagementInterface $customerAccountManagement,
 CustomerUrl $customerHelperData,
 Validator $formKeyValidator,
 AccountRedirect $accountRedirect,
 MagentoCustomerModelResourceModelCustomerCollectionFactory $customerFactory
 ) 
 $this->_customerFactory = $customerFactory;
 parent::__construct($context,$customerSession,$customerAccountManagement,$customerHelperData,$formKeyValidator,$accountRedirect);
 

 public function execute()
 !$this->formKeyValidator->validate($this->getRequest())) 
 /** @var MagentoFrameworkControllerResultRedirect $resultRedirect */
 $resultRedirect = $this->resultRedirectFactory->create();
 $resultRedirect->setPath('*/*/');
 return $resultRedirect;
 
 if ($this->getRequest()->isPost()) 
 $login = $this->getRequest()->getPost('login');

 if(!strpos($login['username'], '@') !== false ) 
 $isMobile = $login['username']; 
 /* Get email id based on mobile number and login*/
 $customereCollection = $this->_customerFactory->create();
 $customereCollection->addFieldToFilter("mobile", $login['username']);
 foreach($customereCollection as $customerdata) 
 $login['username'] = $customerdata['email'];
 
 


 if (!empty($login['username']) && !empty($login['password'])) 
 try 
 $customer = $this->customerAccountManagement->authenticate($login['username'], $login['password']);
 $this->session->setCustomerDataAsLoggedIn($customer);
 $this->session->regenerateId();
 if ($this->getCookieManager()->getCookie('mage-cache-sessid')) 
 $metadata = $this->getCookieMetadataFactory()->createCookieMetadata();
 $metadata->setPath('/');
 $this->getCookieManager()->deleteCookie('mage-cache-sessid', $metadata);
 
 $redirectUrl = $this->accountRedirect->getRedirectCookie();

 if (!$this->getScopeConfig()->getValue('customer/startup/redirect_dashboard') && $redirectUrl) 

 $this->accountRedirect->clearRedirectCookie();
 $resultRedirect = $this->resultRedirectFactory->create();
 // URL is checked to be internal in $this->_redirect->success()
 $resultRedirect->setUrl($this->_redirect->success($redirectUrl));
 return $resultRedirect;
 else
 $resultRedirect = $this->resultRedirectFactory->create();
 $resultRedirect->setPath('');
 return $resultRedirect;
 
 catch (EmailNotConfirmedException $e) 
 $value = $this->customerUrl->getEmailConfirmationUrl($login['username']);
 $message = __(
 'This account is not confirmed. <a href="%1">Click here</a> to resend confirmation email.',
 $value
 );
 $this->messageManager->addError($message);
 $this->session->setUsername($login['username']);
 catch (UserLockedException $e) 
 $message = __(
 'You did not sign in correctly or your account is temporarily disabled.'
 );
 $this->messageManager->addError($message);
 $this->session->setUsername($login['username']);
 catch (AuthenticationException $e) 
 $message = __('You did not sign in correctly or your account is temporarily disabled.');
 $this->messageManager->addError($message);
 $this->session->setUsername($login['username']);
 catch (LocalizedException $e) 
 $message = $e->getMessage();
 $this->messageManager->addError($message);
 $this->session->setUsername($login['username']);
 catch (Exception $e) 
 // PA DSS violation: throwing or logging an exception here can disclose customer password
 $this->messageManager->addError(
 __('An unspecified error occurred. Please contact us for assistance.')
 );
 
 else 
 $this->messageManager->addError(__('A login and a password are required.'));
 
 

 return $this->accountRedirect->getRedirect();
 

I hope this will help