GUIDs are not really designed to be used as security tokens -- they are unique but not secret. The (pseudo)-random process that generates them is not necessarily cryptographically secure.

If you want to change it for any of the existing plans, we will need to use GUIDs of the schemes and AC and DC parameters. You can also use this command to set the timeout in minutes.

Non-random GUIDs UUIDs or GUIDs, whichever you prefer to call them, are a Universally Unique IDentifier, and they get used all over the place.