Worked on the spring-projects/spring-security repository to implement user password update support in JdbcUserDetailsManager, enabling secure and controlled credential rotations. Integrated the UserDetailsPasswordService interface and introduced a configurable flag to allow or prevent password updates, ensuring backward compatibility and minimizing the risk of unintended changes. Developed comprehensive unit tests to verify password update behavior and updated Javadoc and author metadata to document the new capability. Focused on backend development using Java, JDBC, and Spring Security, the work maintained alignment with established standards while enhancing security posture and supporting password rotation workflows without compromising existing functionality or test coverage.