How to get custom input value in the observer in Magento 2

If you want to get any custom input value in the observer please use the below code

	<?php
	/**
	 * Ests AdditionalField custom_value Observer
	 *
	 * @category    Webkul
	 * @package     Webkul_Hello
	 * @author      Webkul Software Private Limited
	 *
	 */
	namespace Ests\AdditionalField\Observer;

	use Magento\Framework\Event\ObserverInterface;
	use Magento\Framework\App\RequestInterface;

	class Custom_value implements ObserverInterface
	{
	    
	    public function __construct(\Magento\Framework\App\Request\Http $request)
        {
          $this->_request = $request;
        }
		public function execute(\Magento\Framework\Event\Observer $observer) {
		  $custom_value = $this->_request->getPost('custom_input_value'); 
		}
	}