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

    return $endpoints;
});

				<div style='height: 98vh;'>
					<div style='text-align: center; padding: 10% 0; font-family: Arial, Helvetica, sans-serif;'>
						<div><p>MalCare Firewall</p></div>
						<p>Blocked because of Malicious Activities</p>
						<p>Reference ID: 9934035586af1b1fedfa22</p>
					</div>
				</div>