disableuser_rest.php

add_action(
'rest_authentication_errors',
function() {
     if ( ( preg_match( '/users/i', $_SERVER['REQUEST_URI'] ) !== 0 ) || ( isset( $_REQUEST['rest_route'] ) && ( preg_match( '/users/i', $_REQUEST['rest_route'] ) !== 0 ) ) ) {
				if ( ! is_user_logged_in() ) {
					$this->sue_log();

					return new WP_Error( 'rest_cannot_access', esc_html__( 'Only authenticated users can access the User endpoint REST API.', 'stop-user-enumeration' ), array( 'status' => rest_authorization_required_code() ) );
				}
			}
   }
);