$ prefect global-concurrency-limit update my-gcl --limit 10
$ prefect gcl update my-gcl --active-slots 5
$ prefect gcl update my-gcl --slot-decay-per-second 0.5
$ prefect gcl update my-gcl --enable
$ prefect gcl update my-gcl --disable --limit 5

$ prefect global-concurrency-limit create my-gcl --limit 10
$ prefect gcl create my-gcl --limit 5 --active-slots 3
$ prefect gcl create my-gcl --limit 5 --active-slots 3 --slot-decay-per-second 0.5
$ prefect gcl create my-gcl --limit 5 --disable