/**
  * Login Customer
  * @return false || \Magento\Customer\Model\Customer
  */
 public function authenticateCustomer()
 {
     $customer = $this->getCustomer();
     if (!$customer->getId()) {
         throw new \Exception(__("Customer are no longer exist."), 1);
     }
     if ($this->_customerSession->loginById($customer->getId())) {
         $this->_customerSession->regenerateId();
         $this->_customerSession->setLoggedAsCustomerAdmindId($this->getAdminId());
     }
     $this->setUsed(1)->save();
     return $customer;
 }