If you are an owner of a workspace you will be able to add, remove and manage user permissions.
Click the manage icon in the top right of your workspace to get started.
In the popup window, you can change the workspace information, members and team that the Workspace is in.
Under the 'Info' tab, you can rename the workspace and change its purpose.
Under the 'Members' tab, you can then change the permissions of users, invite new users, and remove users.
Under the 'More' tab, you can move your Workspace to another team in your account.
Once you’ve made your changes don’t forget to click “Save Workspace” to make your updates.
Note: A default workspace and role can also be set on the Permissions tab of the Team settings to all newly joined team members for your entire team. For details on how to do this please check this article.