How does WebAPI implement single sign-on?

how does a project based on Java"s webApi implement user authorization? How to achieve single sign-on?
the project consists of two parts: webApi and the website. can these two parts use the same authority authentication / single sign-on?

I have referred to some materials on the Internet, including those who use OAuth2.0 and those who implement single sign-on mechanism on their own. I don"t quite understand. Are there any great gods who are familiar with this aspect?

reference address link:
Java-- implements single sign-on

Sso single-sign-on java springboot spring

Apr.01,2021

1. The authority authentication you are talking about is login authentication, right? Api uses jwt scheme, which simply means encrypting uid or establishing a mapping relationship
2. Single sign-on, simply go to see ucenter, watch complex cas, or implement
3 on your own. I didn't expect the scenario in which you api and the website log on at the same time
4.OAuth2.0 and single sign-on

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