class org.springframework.security.oauth2.core.user.DefaultOAuth2User cannot be cast to class com.meli.security1.config.auth.PrincipalDetails (org.springframework.security.oauth2.core.user.DefaultOAuth2User is in unnamed module of loader 'app'; com.meli..

https://velog.io/@kyunghwan1207/22%EB%85%84%EB%8F%84-%ED%95%98%EA%B3%84-%EB%AA%A8%EA%B0%81%EC%BD%94-Springboot-Security%EC%99%80-OAuth2.0%EC%9D%84-%ED%99%9C%EC%9A%A9%ED%95%9C-%EC%86%8C%EC%85%9C%EB%A1%9C%EA%B7%B8%EC%9D%B8%EA%B5%AC%EA%B8%80%EA%B0%9C%EB%B0%9C-4st08oc3

[22년도 하계 모각코] Springboot Security와 OAuth2.0을 활용한 소셜로그인(구글)<개발>

 

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