Prepropulate account fields

Solved!

I used this code written in functions.php file to add extra UM fields (we can find in UM registration form):

/* add custom user fields */
add_action('um_after_account_general', 'showUMExtraFields', 100);

function showUMExtraFields()
{
    $id = um_user('ID');
    $output = '';
    $names = array(
        'phone_number',
        'company_name',
        'job',
        'street',
        'zipcode',
        'city'
        );

    $fields = array();
    foreach( $names as $name )
    {
        $fields[ $name ] = UM()->builtin()->get_specific_field( $name );
    }

    $fields = apply_filters('um_account_secure_fields', $fields, $id);

    foreach( $fields as $key => $data )
        $output .= UM()->fields()->edit_field( $key, $data );

    echo $output;
}

The $names variable is an array of meta key. This meta key is set in field settings.

Thanks to this function, UM will populate automatically the fields in account.