If your are using Briq with slack, no action is required to add or delete a user except keeping your slack up to date. Briq synchronises with your slack workspace every morning to add potential new users from your slack to Briq's users list as well as removing deleted users from this list.
If you are not using Briq on slack, you don't have the ability to add/remove users yourself, so please contact us.
You can manage invitations from the Members section of your admin space. In this section, you will find the lits of all users on your Briq account and you will be able to invite/pause them as well as change their user role. To do so, click on the edit symbol on the right.
You can also decide to invite all users at once by clicking on the "Invite all users" button at the top right corner.