implement java unit testing in our project -- 2

hi our project is Built using spring boot and angular you need to write the junit testcases for our application for every service in the backend.
can you do that please.

Project file: https://drive.google.com/file/d/11R8iqMKdDZ4GshP6FtOZaTAjD01nsAGf/view?usp=sharing

we need the testing to be implemented as in the test folder in this file:??
https://drive.google.com/file/d/1qw-NgPhMOOBxBWoKY5bAl2nPzrNoviND/view?usp=sharing