module Devise::Models::DatabaseAuthenticatable::ClassMethods

end
find(:first, :conditions => conditions)
conditions[:active] = true
def self.find_for_authentication(conditions={})

Example:
namedscope to filter records while authenticating.
Overwrite to add customized conditions, create a join, or maybe use a
Find first record based on conditions given (ie by the sign in form).

def find_for_authentication(conditions)
  find(:first, :conditions => conditions)
end