Nextcloud is a series of client-server programs that allow the creation of file hosting services. Its functionality is similar to Dropbox software, although Nextcloud is entirely open source. Nextcloud allows users to create private servers.
This tool manages to create 3 levels of users by simply playing with the APIs and WebDAV of FileManager users.
In order to execute it correctly you must specify the url without the last slash at the end so that there are no problems. There is a help panel with examples to make the execution clearer.
This mode allows all files and folders of all users to be shared to the administrator user you have configured.
This mode is "undetectable" and allows you to copy all files and directories of all users to the Administrator user you have configured.