You can with the CLI. Since MAAS 3.1 it is soft-deprecated but it is still supposed to work. However If something is not in the UI it does not mean that it is deprecated, there are many other features available only in the CLI for example 
You can with the CLI. Since MAAS 3.1 it is soft-deprecated but it is still supposed to work. However If something is not in the UI it does not mean that it is deprecated, there are many other features available only in the CLI for example