WordPress - Redirect Login to /account/ page

functions.php

<?php

function seed_login_redirect(){
	global $pagenow;
	if('wp-login.php' == $pagenow) {
    if(isset($_POST['wp-submit']) ||  // in case of LOGIN
      (isset($_GET['action']) && $_GET['action']=='logout') ||   // in case of LOGOUT
      (isset($_GET['checkemail']) && $_GET['checkemail']=='confirm') ||   // in case of LOST PASSWORD
      (isset($_GET['checkemail']) && $_GET['checkemail']=='registered')) return;    // in case of REGISTER
    else wp_redirect(home_url('/account/')); // or wp_redirect(home_url('/login'));
    exit();
  }
}
add_action('init','seed_login_redirect');

Credit: https://wordpress.org/support/topic/how-to-change-the-login-link-for-comments/#post-9224784