Populate fields with user name and current date

Hi!

We have custom field group with 2 custom fields:
- user
- date

We would like these fields to ne prefilled by default with the current user editing the post and current timestamp. For timestamp we want it to be updated every time the post is saved.

Example of the generated code:

<?php
add_filter( 'rwmb_meta_boxes', 'your_prefix_function_name' );

function your_prefix_function_name( $meta_boxes ) {
    $prefix = '';

    $meta_boxes[] = [
        'title'        => __( 'VoB Edit Status', 'your-text-domain' ),
        'id'           => 'vob-edit-status',
        'post_types'   => ['post', 'vob-post-news', 'page'],
        'context'      => 'side',
        'storage_type' => 'custom_table',
        'table'        => 'wp_custom_vob_edit',
        'fields'       => [
            [
                'name'          => __( 'Editor', 'your-text-domain' ),
                'id'            => $prefix . 'vob_editor',
                'type'          => 'user',
                'field_type'    => 'select_advanced',
                'multiple'      => true,
                'required'      => true,
                'admin_columns' => [
                    'position'   => 'after date',
                    'title'      => 'Editor',
                    'sort'       => true,
                    'searchable' => true,
                    'filterable' => true,
                ],
            ],
            [
                'name'          => __( 'Edit Date', 'your-text-domain' ),
                'id'            => $prefix . 'vob_edit_date',
                'type'          => 'datetime',
                'timestamp'     => true,
                'required'      => true,
                'admin_columns' => [
                    'position'   => 'after vob_editor',
                    'title'      => 'Edit Date',
                    'sort'       => true,
                    'searchable' => true,
                    'filterable' => true,
                ],
            ],
        ],
        'validation'   => [
            'rules' => [
                $prefix . 'vob_editor' => [
                    'required' => true,
                ],
            ],
        ],
    ];

    return $meta_boxes;
}

Thank you for the advise!