login:function(user,pass){
  async.waterfall([
    function( cb ) {
      // Authenticate
      gameSparks.sendAs( null, ".AuthenticationRequest", {
	userName: user,
	password: pass
      },
  function( err, user ) {
	if ( err ) return cb( err );
	else return cb( null, user );
      });
    },
    function( user, cb ) {
      // Get the user's account details
      gameSparks.sendAs( user.userId, ".AccountDetailsRequest", {}, function( err, res ) {
	if ( err )
  //return false;
  return cb( err );
	console.log( "account details:", JSON.stringify( res, null, 2 ) );
	cb( null, user );
      });
    },
  ], function( err ) {
    if ( err ) console.log( err );

    // If you want to listen for messages back from the Gamesparks server, then do
    // not exit() here.  Just sit around and wait ...
  /**/
   //process.exit(0);
  });
},
registro:function(){

}
};