Thanks @Hofer-Julian for you suggestion but we need sudo (root permissions) to install the package globally. If you want to install it per user, you should use the --user flag without sudo like in the sentence below. If you disagree, please explain your change in more detail.

There's no need for using sudo when installing Flatpak applications globally. Flatpak uses Polkit under the hood to handle that and prompt the user for the root password only when needed.

Flatpak uses Polkit under the hood to handle that and prompt the user for the root password only when needed

Thanks for the detail, I always thought that Polkit is the same, just for GUI.

@Hofer-Julian Please add that the user may be asked to enter the password to complete the action.

Flatpak uses Polkit under the hood to handle that and prompt the user for the root password only when needed

Thanks for the detail, I always thought that Polkit is the same, just for GUI.

@Hofer-Julian Please add that the user may be asked to enter the password to complete the action.

Done @fxha