module Devise

def self.add_mapping(resource, options)

Small method that adds a mapping to Devise. 
def self.add_mapping(resource, options)
  mapping = Devise::Mapping.new(resource, options)
  @@mappings[mapping.name] = mapping
  @@default_scope ||= mapping.name
  @@helpers.each { |h| h.define_helpers(mapping) }
  mapping
end