What functionality or module of the application was under your responsibility in your last project?

In my last Java project, I was responsible for the user authentication and authorization module. This included implementing registration logic, login, as well as managing sessions and user roles. A PostgreSQL database was used for data storage, and interaction with it was carried out through JPA/Hibernate.

Example code for a user verification method:

public boolean authenticate(String username, String password) {
    User user = userRepository.findByUsername(username);
    if (user == null) {
        return false;
    }
    return passwordEncoder.matches(password, user.getPasswordHash());
}

I also worked on integrating with external services for two-factor authentication and ensuring security through Spring Security.