def add_cookie_to_headers(headers)
      if signed_in_with_remember_token?
        Rack::Utils.set_cookie_header!(
          headers,
          remember_token_cookie,
          cookie_options.merge(
            value: current_user.remember_token,
          ),
        )
      end
    end
def add_cookie_to_headers(headers)
      if signed_in_with_remember_token?
        Rack::Utils.set_cookie_header!(
          headers,
          remember_token_cookie,
          cookie_options.merge(
            value: current_user.remember_token,
          ),
        )
      end
    end
@param env The current rack environment
 Called by {RackSession} to add the Clearance session cookie to a response.

 @return [void]