What is the algorithm for registering new users in Laravel Passport?

Question

OAuth

I am writing a web service with a separate back-end on Laravel. I set up Passport, implemented authorization, everything is more or less ok. But with the registration of new users it is not very clear what to do. There are two options:
1) In the post request I send the data of a new user, on the server I enter them into the users table, in the response I issue a token created in this way:

$token = $user->createToken('Token Name')->accessToken;

. A new user is registered in this way, but there is a problem: the expiration date of this token is not known, as in the case of the response from the request to /oauth/token .
2) In a post request, I send the data of a new user, on the server I add them to the users table, return them in the success response, initiate a new request on the client already to /oauth/token and get a full response with access_token, expires_in, refresh_token I'm a little lost on
how best to proceed, maybe I didn’t fully understand the nuances of OAuth2.0 and I don’t know something. Please tell me how to be?