Add a way to change token settings, or if there already is one, document it

[HendrikHuebner]

Expected Behavior
There should be a way to change basic settings of the generated bearer and refresh token such as lifespan.

Current Behavior
I have not found any documentation on how to do this. I have been looking at the code and there seems to be a TokenSettings class,
however, I could not find an easy way to change those settings.

Context
I would like to change token lifespans without having to write a TokenGenerator or something like that

[martinr0x]

Hi Hendrik,
you can change the token life span by overwriting the tokenSettings property ACCESS_TOKEN_TIME_TO_LIVE of your oAuth2 client. https://github.com/spring-projects/spring-authorization-server/blob/main/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/settings/TokenSettings.java#L55

[jgrandja]

@HendrikHuebner Please review the reference documentation for RegisteredClient:

tokenSettings: The custom settings for the OAuth2 tokens issued to the client – for example, access/refresh token time-to-live, reuse refresh tokens, and others.

You can set/override the TokenSettings for a RegisteredClient using custom TTL settings.