Anonymous User Mapping node
Lets users log in to an application or website without providing credentials,
by assuming the identity of a specified existing user account.
The default user for this purpose is named anonymous.
Take care to limit access for such users. For example, grant anonymous users access to public downloads on your site.
Example
The following example uses this node to grant access as an anonymous user to users who have performed social authentication access and do not have an existing profile: