Password generation fails with "Try again"

[Ib01]

Password generation fails with "Try again". I realise this was a design decision with the API and having looked at the code I can see what is happening. However I do think the API would be far more useful if you could guarantee generation of a password with every call. If you are not able to do this you really should document it in your readme so people users of your library are not taken by surprise. Just my 2c.

Great job by the way :)