 userreference field the userreference field stores the uid of a related user the name of the related user is usually displayed as the value of this field the userreference field can use an autocomplete widget or when used with optionwidgets  the available values can be presented to the end user in a dropdown select list checkboxes or radios a userreference field can be used in views to create a relationship to a user to allow you to use any field argument or filter from the related user in your view  