Navigate to your users' section within your deck. To do this, click the top drop-down arrow under your organization and deck name. From there, click the "Users" button which will open up that page.
Remove a User from your Organization
Find the user you are looking for and click the three dots or ellipses on the right-hand side of the user. From there, click the "remove" option.
Update Permissions
Find the user you are looking for and click the three dots or ellipses on the right-hand side of the user. From there, click the "Update Permissions" option.
Once inside this new menu, you can adjust a user's permissions based on what access they need. There are a few options here. The first is an organization admin which has the most access. The second is a deck admin, which can be specified from deck to deck. Finally, the last option is just a user. Each person can have a unique set of roles depending on what is needed and that can be adjusted here.
Organization Admin: The highest level license that can do everything from adding/removing users, updating the master deck, and creating presentations.
Deck Admin: Access and update the master deck along with creating presentations.
Users: Users can update and create presentations.