wp_dropdown_roles in a page

I have a question, I have been trying to create a page in which the admin can change the roles of a user from a dropdown menu. Just like we do in the user settings in dashboard. I have been trying the function wp_dropdown_roles() but I think it wont work because its only allowed on wp-admin? The code so far is ..

function custom_get_users() {
    global $current_user;
    $user_roles = $current_user->roles;
    $user_role = array_shift($user_roles);


    if( is_user_logged_in() && $user_role == 'administrator') {

        echo "<table class='widefat'>";
        echo "<thead>";
        echo "<tr class='thead'>";
        echo "<th>User ID</th>";
        echo "<th>User Name</th>";
        echo "<th>Role</th>";
        echo "</tr>";
        echo "</thead>";

         $args = array(
            'orderby'      => 'ID',
            'order'        => 'ASC',
        );

        $blogusers = get_users( $args );
        // Array of WP_User objects.
        foreach ( $blogusers as $user ) {
            $user_id = $user->ID;
            $user_role = wp_dropdown_roles( $user->roles );
            echo '<tr>';
            echo '<td>' . esc_html( $user_id ) . '</td>';
            echo '<td>' . esc_html( $user->display_name ) . '</td>';
            echo '<td><select>' . esc_html($user_role ) . '</select></td>';
            echo '</tr>';
        }
        echo '</table>';
    } else {
         echo "Only Administrator can see this page.";
    }

}