How to add a WordPress Nonce for this form to avoid CSRF

Here is a Reference to a form field WP Nonce

<form method="post">
   <!-- some inputs here ... -->
   <?php wp_nonce_field( 'name_of_my_action', 'name_of_nonce_field' ); ?>
</form>

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)