The users screen is where you can add new users , delete them, and assign them into groups.
In order to add a user - you must first click ‘New User’, once you’ve clicked it, a window will pop up and you will need to provide a valid email address of the user, and the invitation message (optional).
Once you’re done, click ‘Invite’ to send, or ‘Close’ in order to cancel.
In order to delete a user - simply click the ‘x' that is aside the user’s name - after clicking - confirm the action by clicking ‘Yes’ or ‘No’ if you wish to cancel your action.
Once you have users in your list, in the same row as the user to the far right there is a ‘+' icon, in order to assign, click that icon, and select an available group from the list, click ‘Add’ to assign or 'Cancel’ if you wish to cancel your action.