auth-source-backend
    
    auth-source-backend is an  object constructor function in `auth-source.el'.
Creates an object of class auth-source-backend.
Create a new object with name NAME of class type auth-source-backend
Class description:
auth-source-backend is a class in `auth-source.el'.
Instance Allocated Slots:
Slot: type    type = symbol    default = (quote netrc)
  The backend type.
Slot: source    type = string
  The backend source.
Slot: host    default = t
  The backend host.
Slot: user    default = t
  The backend user.
Slot: port    default = t
  The backend protocol.
Slot: data    default = nil
  Internal backend data.
Slot: create-function    type = function    default = ignore
  The create function.
Slot: search-function    type = function    default = ignore
  The search function.