What methods can be used to update the username in the system?

The username in the system can be updated in several ways, depending on the context and technologies used:

1. Through the user interface (UI) — if the system provides a profile editing form, the user can change the name directly.

2. Via command line or terminal — in Linux/Unix systems, the username can be changed using commands like usermod -l new_name old_name.

3. Through API — if the system provides an API for user management, a request can be sent to update the name.

4. Via database — directly changing the username field in the database table (requires caution and understanding of the structure).

5. Scripts and automation — writing a script that updates the username in the necessary places.

It is important to consider that changing the username may affect access rights, related services, and data, so all dependencies should be checked.