If isset cookie - clear value and redirect to url - WordPress.

snippet.php

<?php
  /**
  * If isset cookie - clear value and redirect to url
  */
  function redirect_after_signin(){

    if(is_user_logged_in()){
      if( ! empty($_COOKIE["redirect_url_sso"])){
        $url = $_COOKIE["redirect_url_sso"];
        setcookie("redirect_url_sso", "", time() - 3600);
        header('Location: ' . $url, true, 302); // Could also use 301.
        // wp_redirect($url);
        // exit;
      }
    }
  }
  
  add_action('init','redirect_after_signin');