title: Authenticate user logged on different subdomain
body: <p>I want to use <a href="https://laravel.com/docs/5.8/passport" rel="nofollow noreferrer">laravel/passport</a> auth2 authentication in <strong>master</strong> service: user login into <strong>master.example.com</strong> and then he click on "go to module One" button. Then he is redirected to <strong>moduleOne.example.com</strong> which is separated angular application which use <strong>master</strong> restfulAPI. </p>
  
  <p>It is possible for <strong>moduleOne</strong> to detect that user was logged into <strong>master</strong> and automatically login to restfulAPI as that user using <strong>oauth2</strong> (so user don't need to type credentials twice)? How to do it?</p>