Default strategy for signing in a user, based on their email and password in the database.
# File lib/devise/strategies/database_authenticatable.rb, line 7 def authenticate! resource = password.present? && mapping.to.find_for_database_authentication(authentication_hash) encrypted = false if validate(resource){ encrypted = true; resource.valid_password?(password) } remember_me(resource) resource.after_database_authentication success!(resource) end mapping.to.new.password = password if !encrypted && Devise.paranoid fail(:not_found_in_database) unless resource end