chapter 5 lack the User class used in the In-memory user detail service

[chenqping]

@habuma

[kangourouNomade]

https://github.com/habuma/spring-in-action-6-samples/blob/64c50d1e1eb5485aafecef2749b0bcd1ca2edf38/ch05/taco-cloud-sfc/src/main/java/tacos/security/SecurityConfig.java

@bean
public UserDetailsService userDetailsService(UserRepository userRepo) {
return username -> {
User user = userRepo.findByUsername(username);
if (user != null) {
return user;
}
throw new UsernameNotFoundException(
"User '" + username + "' not found");
};
}

Bad return type in lambda expression: User cannot be converted to UserDetailsService