Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.] with root cause 위에는 에러 내용 USE 데이터베이스명입력;..