Modification of the existing "School Management System" program

Modification of the existing "School Management System" program:

Link to the program: https://github.com/awaismirza/JAVA-FX-School-Management-System-with-SQLITE

Programming language: JavaFX

The program currently has:

- admin account in which students can be added

- student's account

(You can use DB Browser to check or substitute login and password)

Modification:

- Addition of a teacher account with the possibility of issuing grades.

- Add a student account to check your grades

important:

A comment with a detailed description of the action is required for each line of code.