A "401 Unauthorized" error when your OAuth2 client is calling your OAuth2 resource server in a Spring Security application typically indicates an authentication failure. Here are some steps to troubleshoot and resolve this issue: 1. **Check…
In Spring Security 5.x and later, the `@EnableResourceServer` annotation is part of the OAuth2 functionality and typically used in conjunction with `@EnableWebSecurity`. To configure security for a resource server, you should extend the `ResourceServ…