Hi, the plugin is really awesome, but I encountered twice the problem that the email code was not sent (during activation and test login).
After login, the screen just showed "... email ending in." - but no email displayed. After reloading that page, the end of the email was there and the code was properly sent.
A feature request: For email codes it would be nice to have a button "Resend code" to send the same code again. It doesn't happen often but sometimes emails got lost.