I try to use the APN feedback to get the invalid tokens, so that we can remove them from the database.
But this is what I get on the console in production:
irb(main):011:0> feedback = APN::Feedback.new()
irb(main):004:0> tokens = feedback.tokens
The server sends push with notify_sync and notify_async. So that is working.
There are invalid tokens on my database, so the array should not be empty.
The pull request above should fix it.
Fixes to_s message of feedback class (fixes #60).