The People Directory is accessed through the left-side menu bar:

 

User location can be edited within the People Directory.

Users can be deleted by clicking on the "x" under the Actions column for the respective user.

 

Admins can promote other users to have admin permissions by clicking on the "Promote to admin" button under the actions column for that particular user.

 

Clicking on a user avatar will bring their user profile on the right-side of the screen for additional context.

 

Note: Emails cannot be changed for users once they are created. Names can be changed from within a User's profile card.