CODE EXAMPLE FOR PHP

turn off wordpress user list exposed

add_filter( 'rest_endpoints', function( $endpoints ){
    if ( isset( $endpoints['/wp/v2/users'] ) ) {
        unset( $endpoints['/wp/v2/users'] );
    }
    if ( isset( $endpoints['/wp/v2/users/(?P<id>[d]+)'] ) ) {
        unset( $endpoints['/wp/v2/users/(?P<id>[d]+)'] );
    }
    return $endpoints;
});