Ultimate Member v3: Password Reset 'um_lostpassword_errors_hook' hook

functions.php

// 'um_reset_password_errors_hook' - use action hook 'um_lostpassword_errors_hook' instead

/**
 * Fires after Ultimate Member native Lost Password form validations are completed.
 *
 * Note: Use this hook for adding custom validations to your Lost Password form.
 *
 * Hook: um_lostpassword_errors_hook
 *
 * Type: action
 *
 * @package  um\core
 * @since    3.0.0
 *
 * @param array $lostpassword_form Frontend form class (\um\frontend\Form) instance.
 */
function my_lostpassword_errors_hook( $lostpassword_form ) {
	// Flush all errors of the Lost Password form
    $lostpassword_form->flush_errors();
    // Add global form error
    $lostpassword_form->add_error( 'global', __( 'Error description here', 'ultimate-member' ) );
    // Add field-related error where 'user_login' is the field's id when form is inited see ultimate-member/includes/common/class-shortcodes.php line 156
    $lostpassword_form->add_error( 'user_login', __( 'Error description here', 'ultimate-member' ) );
    // Checking errors for the form
    $lostpassword_form->has_errors();
}
add_action( 'um_lostpassword_errors_hook', 'my_lostpassword_errors_hook', 10, 1 );