module Devise::Orm::MongoMapper

def self.included_modules_hook(klass) 

def self.included_modules_hook(klass)
  klass.send :extend,  self
  klass.send :include, InstanceMethods
  yield
  klass.devise_modules.each do |mod|
    klass.send(mod) if klass.respond_to?(mod)
  end
end

def apply_schema(name, type, options={})

to Time, since MongoMapper does not recognize the former.
Tell how to apply schema methods. This automatically converts DateTime 
def apply_schema(name, type, options={})
  return unless Devise.apply_schema
  type = Time if type == DateTime
  key name, type, options
end

def find(*args) 

def find(*args)
  case args.first
  when :first, :all
    send(args.shift, *args)
  else
    super
  end
end