functions.php

function getTeamMembers()
{
    $args = array('post_type' => 'team', 'posts_per_page' => -1);
    // Run a custom query
    $loop = new WP_Query($args);
    if ($loop->have_posts()) {
        $i = 0;
        $data = array();

        while ($loop->have_posts()) {
            $loop->the_post();
            $data[$i]['title']          =   get_the_title();
            $data[$i]['excerpt']        =   get_the_excerpt();

            $i++;
        }
        // Return the data
        return $data;
    }
}
//Add the makes endpoint
add_action('rest_api_init', function () {
    register_rest_route('gallery/v1', '/post-gallery', array(
        'methods' => 'GET',
        'callback' => 'getTeamMembers',
    ));
});