Получите Params JS
// www.example.com/users?token=12345
let params = (new URL(document.location)).searchParams;
let token = params.get("token");
// 12345
Lucas Juan
// www.example.com/users?token=12345
let params = (new URL(document.location)).searchParams;
let token = params.get("token");
// 12345Object.fromEntries(location.search.substr(1).split("&").map(pair => pair.split("=")))