Add pagination to my WP_Query?

<?php
function myVotes($userID,$returnCount) {

$args = array (
    'post_type'              => 'vote',
    'posts_per_page'         => $returnCount,
    'meta_key'               => 'end_order_full_date',
    'orderby'                => 'meta_value_num',
    'order'                  => 'DESC',
    'meta_query'             => array(
        array(
            'key'       => 'status',
            'value'     => 'Completed'
        ),
        array(
            'key'       => 'voters_id',
            'value'     => $userID
        )
    ),
);

$query = new WP_Query( $args );

   return $query;
    wp_reset_postdata();
}

 <?php
    $myVotes = myVotes($userID,3);


if ($myVotes->have_posts()) : while ($myVotes->have_posts()) : $myVotes->the_post();

        // CALL MY TITLES AND OTHER INFO TO DISPLAY ETC

endwhile; else :
        echo '<div id="error_main">';
        echo "You have not placed any votes.";
        echo '</div>';
endif; 



} else {
    wp_redirect( home_url() );
    exit;
}
?>