# File lib/flickr/base.rb, line 235
        def to_xml
                    return "<auth><token>#{self.token}</token>"+
                           "<perms>#{self.perms}</perms>"+
                           "<user nsid=\"#{self.user.nsid}\" "+
                           "username=\"#{self.user.username}\" "+
                           "fullname=\"#{self.user.realname}\" /></auth>"
        end