Where is the menu file?

I want to hide one of the menu item in the sidebar but I cannot find it in the file, can someone show me the way, thank you

It is app/Http/Middleware/AdminMenu.php

You can also create a new Role without Read permission for that menu item and assign the User to that Role, they won't see the menu item: https://akaunting.com/docs/user-manual/auth/users

Thank you for response, great now im finally able to hide the menu