Allows a user to specify the users who will have permissions for the project as defined by the Project permissions specified in the project’s Permissions field. Typically these users will have only read, but not write, permissions for the project. For example, if a project is assigned the predefined “Project Full Permissions” permission, users entered into the Users Readers field will have the permissions specified by the “Project Full Permissions” permission for User Readers (that is, the Read permissions).