In an environment, I was able to add a new user easily with the "Add user" button and grant the necessary roles to access Guides projects inside the environment. When the user is no longer need access to the environment, there seems no way to remove the account out from the environment; the only thing I can do to limit the access the user to access the environment is to remove all roles granted prior but the account remain in the user list...

Please add a "Remove User" button to the environment so we can do a better clean-up on the user list.