question: public boolean authenticate ( final OddCallback < AuthToken > callback ) { synchronized ( syncLock ) { if ( isExpired ( ) ) { return false ; } if ( ! authenticating ) { authenticating = true ; timer = new Timer ( ) ; TimerTask task = getPollTask ( callback ) ; timer . schedule ( task , new Date ( ) , interval ) ; TimerTask expiredTask = getExpiredTask ( callback ) ; timer . schedule ( expiredTask , expirationDate ) ; } return true ; } }
target:  If not expired then this will continue polling the server until time expires or an auth token is obtained Callback.onFailure will be completed with DeviceCodeExpiredException if this object expires without getting an auth token. It's not neccessary to use this method if you are using the rxAuthenticate method