An Accessor entity can be used to represent a user of the DSA
 such that the DSA can verify the user's identity when they
 attempt to connect.

 Normally, a DSA verifies the identity of a directory user by
 reference to directory information. However, an Accessor entity
 provides a way of giving a DSA information about a user without
 having to represent that user in the directory. This might be useful
 in some problem solving situations. However, it is not the recommended
 way to represent users of the DSA.

 Note that the Accessor entity is a volatile entity. If you delete the
 DSA entity for a given system, then all Accessor entities for that system
 are deleted permanently.

 Note also that an Accessor entity only permits a user to identify
 themselves to this DSA. If the user wants identify themselves to
 another DSA, then that DSA also needs an Accessor entity.