There are four main roles in a BigML organization: owner, admin, member, and restricted member. The roles define the user actions in the organization, i.e., the management of the organization account, and the ability to create and access projects.
If you have an owner or admin role in your organization, you will be able to invite new users, revoke an existing invitation, manage user roles in the organization, and remove users from the organization. All these options are available from the Users section in your organization account. Please read the Managing Users in the Organization chapter of our organizations Dashboard documentation to learn how to perform all of these actions.