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How can I create my own event and observer for customer sign up,
From this link,

Magento2 : customer_account_create event is not triggering

I found that We can use customer_register_success for customer register success.

So I found that events.xml in /module-persistent/etc/webapi_rest/events.xml

<event name="customer_register_success">

    <observer name="persistent" instance="MagentoPersistentObserverRemovePersistentCookieOnRegisterObserver" />

</event>

So observer file is RemovePersistentCookieOnRegisterObserver.php
I want to make my custom event and observer for customer sign up, how to achieve that and where should I write my custom events and observer.

This is my code

 namespace YXCustomerObserver



 class RegisterSuccess implements MagentoFrameworkEventObserverInterface

{



protected  $customlogger;

protected  $tempblock;

protected  $customerHelper;





public function __construct(

    RageBaseHelperCustomLogger $loggerHelper

     YXCatalogBlockOrderHelper $orderHelper,

    YXCustomerHelperCustomerHelper $customerHelper



)

{

    $this->customlogger = $loggerHelper->getLogger('custom');

    $this->tempblock = $this->getLayout()->createBlock('YXCatalogBlockOrderHelper');

    $this->customerHelper = $this->helper('YXCustomerHelperCustomerHelper');

}

public function execute(

    MagentoFrameworkEventObserver $observer

) {



 MagentoFrameworkAppObjectManager::getInstance()

        ->get(PsrLogLoggerInterface::class)->debug("here in customer 

 login before func " .$this->customerHelper->isCustomer());



    if (!($this->customerHelper->isCustomer())){

        $customerID = $this->customerHelper->getCustomerId();

        $orderId = $this->customerHelper->getOrderId();

        $this->tempblock->guestToCustomer($orderId,$customerID);



    }

}

}

I have put dubgger logs but still, on the user sign up it doesn't go inside execute() function

Try this,

Create this file in the path app/code/vendor/module/etc/events.xml
For example ,

<?xml version="1.0" ?><config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">

<event name="customer_register_success">

    <observer instance="vendormodulenameObserverCustomerRegisterSuccess" name="customer_register_succes"/>

</event>

then

Place the respective observer file in the folder defined like app/code/vendor/module/Observer/Customer/RegisterSuccess.php

<?php                                                         

 namespace vendormoduleObserverCustomer;                        

 class RegisterSuccess implements MagentoFrameworkEventObserverInterface                                

 {



public function __construct(

    RageBaseHelperCustomLogger $loggerHelper

    )

{

    $this->customlogger = $loggerHelper->getLogger('custom');

}

public function execute(

    MagentoFrameworkEventObserver $observer

) {



    $customer = $observer->getEvent()->getData('customer');

    $this->customlogger->addInfo("Observer : Customer Register Successfull");

}}

hope this helps.