Filter for login form validation error.

Source

File: /inc/class-wp-travel-form-handler.php
Used by: /inc/class-wp-travel-form-handler.php

Parameters
$validation_error, $username, $password

Example:

function prefix_wp_travel_process_login_errors( $validation_error, $username, $password ) {
    $validation_error = ‘ERROR VALIDATION HERE’;
    return $validation_error;
}
add_filter( 'wp_travel_process_login_errors', 'prefix_wp_travel_process_login_errors', 12, 3 );