AddSiteAuthenticatedUser | Adds site user with credentials for LDAP authentication. | 
  AddSiteUser | Creates a new site user. | 
  AddUser | Adds an existing site user to the current project. | 
  RemoveUser | Removes a user from the collection. | 
  User | The CustomizationUser object representing the specified user. | 
  Users | The list of customization users. |