question: public AuthRequest authenticate ( List discoveries , String returnToUrl ) throws ConsumerException , MessageException { return authenticate ( discoveries , returnToUrl , returnToUrl ) ; }
target:  Builds a authentication request message for the user specified in the discovery information provided as a parameter. <p> If the discoveries parameter contains more than one entry, it will iterate over them trying to establish an association. If an association cannot be established, the first entry is used with stateless mode.