module Devise::Models::DatabaseAuthenticatable

def update_without_password(params, *options)


end
super(params)
params.delete(:email)
def update_without_password(params, *options)

Example:

attributes you would not like to be updated without a password.
method, you should probably override this method to protect other
Never allows a change to the current password. If you are using this
Updates record attributes without asking for the current password. 
def update_without_password(params, *options)
  if options.present?
    ActiveSupport::Deprecation.warn <<-DEPRECATION.strip_heredoc
      [Devise] The second argument of `DatabaseAuthenticatable#update_without_password`
      (`options`) is deprecated and it will be removed in the next major version.
      It was added to support a feature deprecated in Rails 4, so you can safely remove it
      from your code.
    DEPRECATION
  end
  params.delete(:password)
  params.delete(:password_confirmation)
  result = update(params, *options)
  clean_up_passwords
  result
end